Sonic History Lore PDF

Millions of Years Ago: Dark Gaia and Light Gaia engage in a cyclical battle every million years. Dark Gaia awakens, shattering the planet, while Light Gaia restores it. This cycle continues every million years. The Gaia Temples are created to harness the planet’s energy and help restore the world...

Millions of Years Ago: Dark Gaia and Light Gaia engage in a cyclical battle every million years. Dark Gaia awakens, shattering the planet, while Light Gaia restores it. This cycle continues every million years. The Gaia Temples are created to harness the planet’s energy and help restore the world after Dark Gaia’s destruction. The creators of these temples are unknown, and the Chaos Emeralds are not yet involved. --- 100,000+ Years Ago: The Ancients, an advanced alien race, live on their home planet with five other tribes. The End, a cosmic entity, attacks their planet, destroying the other tribes. The Ancients develop Chaos Engines to harness the Chaos Emeralds and power their spaceships, allowing them to escape their doomed planet. While traveling through space, the Chaos Emeralds react to the Master Emerald on Earth, pulling the Ancients' ships to the Starfall Islands. The Ancients settle on Earth, building Cyber Space, altars for the Chaos Emeralds, and the Titans to defend themselves from The End. The End eventually finds Earth and attacks again, killing many of the Ancients. The Titans manage to seal The End in Cyber Space, but most Ancients perish. Some survivors flee to Angel Island, where they devolve into the Chao over time. Chaos, a mutated Chao, becomes the guardian of the Master Emerald. Tens of Thousands of Years Ago: The Gaia Manuscripts are written, chronicling the cycle of Dark Gaia's awakening and Light Gaia's restoration of the planet using the Gaia Temples. After the arrival of the Chaos Emeralds with the Ancients, the Gaia Temples are enhanced with the power of the Emeralds to aid in restoring the world. Arrival and Fall of Babylon Garden (Ancient Past): The Babylonians, another advanced alien civilization, travel through space aboard their massive ship, Babylon Garden, powered by the Arks of the Cosmos. While passing by Earth, the Babylonians lose control of the Arks, threatening to create a black hole. To prevent disaster, they disconnect the Arks and send them into Earth’s orbit, causing Babylon Garden to crash-land on Earth. The Babylonians settle around Astral Babylon and build their floating island. Over time, they gain a reputation as the legendary thieves known as the Babylon Rogues. 4,000+ Years Ago (Nocturnus Clan and the Fall of the Echidna Tribe): The Nocturnus Clan, an echidna empire, rises as a dominant force, becoming rivals to the Echidna Tribe, which also seeks control over ancient technology, including the Master Emerald. The Nocturnus Clan creates an army of advanced robots known as the Gizoids, including Emerl, to bolster their power. During this period, the Echidna Tribe falls due to the wrath of Chaos, who destroys much of the tribe to prevent them from using the Chaos Emeralds for dominance. Tikal seals herself and Chaos inside the Master Emerald. After the near-total destruction of the Echidna Tribe, the Nocturnus nearly colonizes the entire world. However, just as their conquest is within reach, the Argus Event occurs, and the Nocturnus Clan, along with the rest of the Gizoids, are banished to the Twilight Cage. Emerl, excluded from the Argus Event, remains dormant on Earth. Thousands of Years Ago: The Echidna Tribe is wiped out by Chaos, and the survivors scatter. Angel Island and the Master Emerald remain isolated, awaiting their future guardian. Babylon Rogues Legend: After being stranded on Earth, the Babylonians build a reputation as master thieves and develop Extreme Gear technology. They use Magic Carpets (prototypes of Extreme Gear) to travel the world and collect treasures. The Babylonians eventually anger the gods with their greed, and Babylon Garden is buried in the sands near Sand Ruins. The Babylonians fade into legend, and their alien origins are forgotten. Their descendants believe they were genies and continue the tradition of treasure hunting as the Babylon Rogues. Thousands of Years Ago (Creation of Solaris): In Soleanna, the people worship Solaris, the Flame of Hope, which exists across the past, present, and future and controls time. Over time, experiments with Solaris lead to its division into two entities: Iblis (destruction) and Mephiles (manipulation). Both entities are sealed by the royal family of Soleanna to prevent disaster. 2000+ Years Ago (Black Arms): Black Doom, the leader of the Black Arms, creates the alien race. Over 2,000 years ago, they construct a floating temple and bring it to Earth, terrorizing the local population. The details of their actions during this time are not fully known. Around 130 years ago: Gerald Robotnik is Born 62 years Ago: Maria Robotnik is born Sometime 50+ years ago: Abraham Tower (Eventual GUN Commander) is born Ivo Robotnik (Dr. Eggman) is born 50+ Years Ago (Project Shadow and Discovery of Emerl): Project Shadow is conceived by the president of the United Federation under the pretense of achieving immortality, but its true purpose is to develop weapons of mass destruction. Professor Gerald Robotnik is recruited to lead the project. Gerald accepts, using the project to secretly find a cure for his granddaughter Maria’s illness, Neuro-Immune Deficiency Syndrome (NIDS). Gerald’s early research involves experimenting with Chaos Emerald energy, leading to the creation of Chaos Drives and the Biolizard, an unstable prototype of the Ultimate Life Form. During this time, Gerald discovers the dormant Emerl, an ancient Gizoid from the Nocturnus Clan. Recognizing Emerl’s destructive potential, Gerald modifies Emerl with a "soul" based on Maria’s personality to suppress his dangerous tendencies. Ultimately, after wreaking havoc on the ARK, he was later once again shut down. Meanwhile, Black Doom contacts Gerald and offers his assistance in exchange for the Chaos Emeralds. Using Black Doom’s DNA, Gerald creates Shadow the Hedgehog, the final and stable version of the Ultimate Life Form. Project Shutdown and G.U.N.’s Involvement: G.U.N. becomes increasingly aware of Project Shadow and Gerald’s contact with the Black Arms. Fearing the potential dangers, G.U.N. launches the ARK Shutdown Operation, falsely claiming a biohazard outbreak on the ARK. G.U.N. soldiers raid the ARK, terminating all research related to Project Shadow. During the raid, Maria Robotnik helps Shadow escape in a stasis pod but is shot and killed in the process. Gerald's Revenge and Execution: After Maria’s death, Gerald Robotnik is driven mad with grief and secretly reprograms the ARK to crash into Earth as revenge against humanity. Gerald also brainwashes Shadow to carry out this plan when he awakens. Fearing retaliation, G.U.N. executes Gerald, and Shadow is placed in suspended animation. All research on Project Shadow is permanently ceased. 10-20 years ago: Birth of Heroes, Allies, and Foes Vector the Crocodile - 20 Bark the Polar Bear - 19 Rouge the Bat - 18 Fang the Hunter (Sniper) - 18 Big the Cat - 18 Knuckles the Echidna - 16 Espio the Chameleon - 16 Mighty the Armadillo - 16 Sonic the Hedgehog - 15 Bean the Dynamite - 14 Amy Rose - 12 Ray the Flying Squirrel - 12 Trip the Sungazer - Unknown 10 Years Before Sonic 06: (before being erased from the timeline) The Solaris Project is initiated by the Duke of Soleanna, aiming to harness the power of Solaris to control time. The project goes wrong, splitting Solaris into Iblis and Mephiles. Iblis is sealed inside Princess Elise, while Mephiles is sealed in the Scepter of Darkness. The Duke sacrifices his life to prevent the full manifestation of Solaris. Within 8 years ago: Birth of Allies Tails (Miles Prower) - 8 Cream the Rabbit - 6 Charmy Bee - 6 Modern Age (The rise of Sonic the Hedgehog's heroic era) The span of the timeline from here is unclear, as most heroes and foes here do not appear to age The timeline from here becomes uncertain, as most of the characters, particularly Sonic and his allies, show no significant signs of aging. This marks the beginning of Sonic’s legendary exploits and the birth of a new era of heroes and foes. South Island Incident (Sonic the Hedgehog 1): This marks the emergence of the renowned hero, Sonic the Hedgehog. Although his true origins remain somewhat mysterious, his motivation is rooted in his deep love for peace and freedom. Sonic's journey begins on South Island, where Dr. Robotnik (Eggman) launches his first significant attempt at world domination. Robotnik captures animals and transforms them into robots to build his army while industrializing the island, intending to expand across the globe. Learning of Robotnik’s plans, Sonic rushes to save the animals, destroying Robotnik’s industrial bases, including the menacing Scrap Brain Zone. Along the way, Robotnik seeks the powerful Chaos Emeralds, discovering their potential for immense power. There are only six Chaos Emeralds found at this time, with the seventh located elsewhere. Sonic collects all six Chaos Emeralds, foiling Robotnik’s plans and freeing South Island from his grasp. The Chaos Emeralds vanish, being transported to another island. The Little Planet Incident (Sonic CD): Creation of Metal Sonic Every year, Never Lake on Earth witnesses the appearance of the Little Planet, a mysterious celestial body. Little Planet houses the powerful Time Stones, seven mystical gemstones capable of controlling time. Seeing an opportunity, Dr. Eggman seizes the planetoid, chaining it to a nearby mountain and covering it in a metallic shell to start his operations. His goal: use the Time Stones to manipulate time and ensure his control over Little Planet’s future. Sonic, unaware of Eggman’s plan, arrives at Never Lake only to find Little Planet already transformed by Eggman. Determined to stop him, Sonic enters Little Planet, where he meets Amy Rose, a hedgehog who has long idolized Sonic and is there after a fortune telling stating that her hero will be met. Eggman’s latest creation, Metal Sonic, kidnaps Amy, forcing Sonic into a chase across Little Planet’s many zones. Sonic eventually confronts Metal Sonic in a high-speed race in Stardust Speedway, defeating the robot and rescuing Amy. Sonic then battles Eggman in Metallic Madness, destroys the machine holding Little Planet captive, and frees the planetoid. Sonic and Amy return to Earth, with Sonic watching as Little Planet breaks free from Eggman’s chains. West Side Island and the Death Egg Incident (Sonic the Hedgehog 2): The story moves to West Side Island, where an ancient civilization once thrived, using mystical stones, later revealed as the Chaos Emeralds. However, their misuse of the stones led to their downfall, and the gods sealed the Emeralds deep within the island. During his travels, Sonic discovers the island and meets Miles "Tails" Prower, a shy, two-tailed fox who idolizes Sonic. Meanwhile, Dr. Robotnik arrives on West Side Island, seeking all seven Chaos Emeralds to power his ultimate weapon: the Death Egg, a massive space station. Sonic and Tails journey through the island, thwarting Eggman’s plans, battling him in various zones, collects all the Chaos Emeralds, and eventually boarding the Wing Fortress. Here, Sonic discovers his ultimate form, Super Sonic. After destroying the fortress, Sonic and Tails chase Robotnik to the Death Egg. There, Sonic defeats Mecha Sonic and faces Eggman in the formidable Death Egg Robot. Following a fierce battle, the Death Egg explodes, and Sonic barely escapes the wreckage, falling through the atmosphere. Tails saves him with the Tornado, solidifying their brotherhood, while the Death Egg crash-lands on a mysterious island. The Angel Island Incident (Sonic the Hedgehog 3 & Sonic & Knuckles): The Death Egg crashes onto Angel Island, where Knuckles the Echidna, the island’s guardian, resides. Dr. Eggman tricks Knuckles into believing Sonic is the enemy. As Sonic and Tails arrive on Angel Island, they battle Eggman’s forces while Knuckles attempts to hinder their progress. Their goal is to stop Eggman from repairing and launching the Death Egg again. Sonic discovers the Master Emerald on Angel Island, which keeps the island afloat. After collecting the Chaos Emeralds, Sonic reaches the Hidden Palace and battles Knuckles. Upon learning the truth of Eggman’s deception, Knuckles aids Sonic in stopping the doctor. In the Sky Sanctuary, Sonic battles Mecha Sonic Mark II and eventually boards the Death Egg once again. There, Sonic defeats Eggman and destroys the Giant Eggman Robo, which is powered by the Master Emerald. With the Death Egg finally destroyed, Sonic retrieves the Master Emerald, returning it to Angel Island, allowing the island to rise into the sky once more. Eggman Island Incident (SegaSonic the Hedgehog) The exact placement of this incident in this timeline is unknown, but prior to the Newtrogic High Zone Incident In a diabolical plan, Dr. Eggman kidnaps Sonic the Hedgehog, Ray the Flying Squirrel, and Mighty the Armadillo using his massive tank-like vehicle. He transports the trio to Eggman Island, an island riddled with deadly traps and dangerous hazards that can be activated at the push of a button by Eggman himself. Sonic, Ray, and Mighty quickly band together to escape their predicament. The island is filled with deadly obstacles, from collapsing floors to spike traps, all designed to prevent their escape. The trio must work in unison to navigate through the hazards and avoid being captured again as they make their way toward Eggman’s Tower. When they finally reach the control room at the heart of the tower, Eggman unleashes his final scheme: he triggers a self-destruct sequence that will obliterate the entire island. With little time to spare, Sonic, Ray, and Mighty manage to flee the island in a thrilling race against the clock. Just as they escape, Eggman himself tries to flee using his Egg Mobile, but it runs out of fuel. The evil doctor is last seen plummeting into the sea as his plans are once again foiled. Though they narrowly avoid destruction, Sonic and his friends successfully thwart Eggman’s plot and live to fight another day. Triple Trouble Incident (Sonic Triple Trouble) Dr. Eggman, through unknown means, manages to gather the seven Chaos Emeralds without Sonic's knowledge. However, during the testing phase of a new weapon, an accident causes all but one of the Emeralds to be scattered into the Special Stage, leaving Eggman with only the yellow Emerald. As Eggman anticipated, Sonic and Tails learn of the situation and set out to recover the Chaos Emeralds. To delay their progress, Eggman tricks Knuckles into believing Sonic is trying to collect the Emeralds for world domination. While searching for the Chaos Emeralds, Sonic and Tails encounter Knuckles, who challenges them but ultimately departs after a brief confrontation. Meanwhile, a treasure hunter named Fang the Sniper listens in on the exchange and sneers, having already collected five Chaos Emeralds in subspace. Sonic and Tails continue their quest, eventually facing Knuckles again in the Tidal Plant and defeating him. Dr. Eggman captures Knuckles afterward, while Sonic and Tails venture into Eggman's newest base, Atomic Destroyer, where they battle Metal Sonic and ultimately defeat him. Soon after, they encounter Fang, who flees, leaving them to face Eggman in his latest creation. Sonic and Tails defeat Eggman, recover the last Chaos Emerald, and free Knuckles, making peace with him before continuing on their journey. Newtrogic High Zone Incident (Knuckles' Chaotix) Months after the Angel Island and Triple Trouble incidents, tectonic movements in the South Sea cause a mysterious island to emerge. The island is quickly transformed into a lush landscape due to the power of the Altar of Emerald's energy. Dr. Eggman investigates and discovers that this island was once home to a lost civilization. He stumbles upon a Giant Ring, similar to the ones on Angel Island, which he deduces can lead him to the Master Emerald. Eggman establishes a resort on the island, calling it Newtrogic High Zone. Using the Giant Ring's power, Eggman creates Dark Rings from the island’s Chaos Rings and develops a Ring Power device to create a spacetime connection. At the same time, Knuckles the Echidna, curious about the island and driven by his duty as the guardian of the Master Emerald, arrives on a nearby island and encounters Eggman and Metal Sonic imprisoning Espio the Chameleon. After fighting off Eggman and Metal Sonic, Knuckles teams up with Espio and is later joined by Vector, Charmy, Mighty, Heavy, and Bomb. Together, they traverse Newtrogic High Zone, hunting for the Chaos Rings and dismantling Eggman's operations. Eventually, the team defeats Metal Sonic Kai, a transformed version of Metal Sonic powered by a Dark Ring, and restores peace to the island. Sonic and Tails arrive afterward to congratulate Knuckles and his team for their efforts. Flickies' Island Incident (Sonic 3D Blast) The legend of the Chaos Emeralds leads Sonic, Tails, and Knuckles to Flickies' Island, where it is said that the seven Emeralds lie dormant. Upon their arrival, they discover that Dr. Eggman has learned of the Emeralds and is searching for them, using the local Flickies—small birds capable of traveling through subspace using Dimension Rings—to locate the gems. Eggman captures the Flickies and imprisons them in his Badniks, planning to use them to find the Chaos Emeralds and, once again, attempt to conquer the world. Sonic arrives and begins freeing the Flickies from their mechanical prisons while racing against Eggman to find the Chaos Emeralds in the Special Stages. After freeing all the Flickies, Sonic confronts Eggman in his base, Panic Puppet, and ultimately defeats him in the Final Weapon. With Eggman’s plans foiled once again, Sonic celebrates his victory alongside the Flickies, restoring peace to their island. Northstar Island Incident (Sonic Superstars): Dr. Eggman hires Fang and Trip to capture giant animals as part of his plan on Northstar Island. As Eggman monitors their progress, Sonic and Tails head to the island aboard the Tornado, attracting the attention of Amy and Knuckles, who join them. The heroes chase after Fang, fighting through Eggman's mechs and defeating his creations across various areas. During their journey, the heroes free animals from Eggman’s control and face challenges set by Trip, who eventually starts to sympathize with them after Amy helps her out of a trap. Knuckles discovers a mural of a Black Dragon, while Fang ambushes him and steals the Chaos Emeralds. Trip then transforms into her dragon form, seizing the emeralds and knocking out Fang. The group eventually battles Eggman’s forces in Cyber Station and Frozen Base, ultimately infiltrating the Egg Fortress in space. After defeating Eggman and heavily damaging the fortress, they escape in time before its destruction. After the battle, the Black Dragon emerges from the ocean, and Super Sonic fights it with the help of his friends. Trip uses the Black Onyx to seal the dragon back into its dimension, and the heroes celebrate their victory with the forest critters. The Phantom Ruby Incident (Sonic Mania) (Alternate timeline event caused by the future events of the Time Eater Incident) Some time after the Death Egg saga, a mysterious dimensional breach appears in Earth’s atmosphere, emanating an unprecedented energy signature near Angel Island. Tails, while relaxing with Sonic, detects this anomaly. Despite not being tied to the Chaos Emeralds, the reading is remarkably powerful, prompting Tails to convince Sonic to investigate. They set off toward Angel Island in the Tornado. Meanwhile, Dr. Eggman, always seeking power, also discovers the energy reading and realizes the potential for untold power. He dispatches his elite robotic force—the Hard Boiled Heavies, a unit of five advanced Egg Robos—to retrieve the energy source. Arriving on Angel Island, Sonic and Tails witness the Hard Boiled Heavies excavating the Phantom Ruby, a gemstone with reality-warping abilities. As the robots extract the ruby, a massive distortion in space-time occurs, warping everyone nearby, including Knuckles the Echidna, to Green Hill Zone. However, everything has changed. The Phantom Ruby’s power transforms the Hard Boiled Heavies, granting them increased power, free will, and turning them into formidable enemies. Determined to stop Dr. Eggman from using the Phantom Ruby’s power for his nefarious plans, Sonic, Tails, and Knuckles join forces to retrieve the gem. Pursuing the rogue Hard Boiled Heavies, the heroes soon discover that Eggman has already stolen the Phantom Ruby from his own robots, seizing its reality-bending power. With the ruby in hand, Eggman sends Sonic and his friends to Chemical Plant Zone, attempting to throw them off their chase. Despite Eggman’s attempts to stall them, Sonic, Tails, and Knuckles continue their pursuit, battling through Eggman’s machines and the now-enhanced Hard Boiled Heavies across multiple zones. Along their journey, they realize that Eggman has mechanized Little Planet once again, turning it into his operational base. The final confrontation takes place aboard the Titanic Monarch, a colossal robot built to wield the Phantom Ruby’s immense power. Sonic, Tails, and Knuckles fight Eggman, alongside the Phantom Heavies, the Hard Boiled Heavies now further empowered by the ruby. The trio successfully defeats Eggman and the Heavies, but before they can secure the Phantom Ruby, Sonic and Eggman are suddenly pulled into a mysterious dimension by the gem’s power. Within this strange space, the Phantom King—a modified version of the Hard Boiled Heavies' leader, the Heavy King—seizes control of the Phantom Ruby for himself, wielding immense power. Eggman, determined to reclaim the gem, attacks the Phantom King in his Klepto Mobile, sparking a three-way battle for control over the ruby. Caught in the chaos, Sonic uses the Chaos Emeralds to become Super Sonic and defeats both Eggman and the Phantom King. However, after dealing the final blow, Sonic becomes separated from the Chaos Emeralds. The Phantom Ruby, now unstable, pulls both itself and Sonic into a spatial warp, propelling Sonic to the future, setting the stage for the Infinite Incident. Meanwhile, back on Earth, Tails and Knuckles watch as the mechanized Little Planet vanishes, the sky clearing to reveal a smiling Sonic winking at them from the heavens. Sonic, however, now heads toward places unknown, carried away by the Phantom Ruby’s enigmatic power. The Chaos Incident (Sonic Adventure): Years later, Doctor Eggman, always seeking a new way to defeat his nemesis, Sonic the Hedgehog, and conquer the world, uncovers an ancient legend about a powerful entity named Chaos. Thousands of years ago, Chaos served as the guardian of the Chao and the Master Emerald, which balanced the power of the seven Chaos Emeralds. When the Knuckles Clan of echidnas attempted to steal the Chaos Emeralds' power, breaking their harmony with the Chao, Chaos unleashed its fury. Using the Chaos Emeralds, it transformed into Perfect Chaos, a monstrous creature that destroyed the echidna tribe. Tikal, a young echidna who befriended Chaos, intervened and imprisoned both Chaos and herself within the Master Emerald. Learning of this legend, Eggman devises a plan: shatter the Master Emerald to release Chaos and use its power to destroy Station Square, paving the way for his dream of building "Eggmanland." When Sonic arrives in Station Square, he witnesses the local police failing to stop the released Chaos. Realizing the danger, Sonic and Tails work to stop Eggman from feeding Chaos more power through the Chaos Emeralds. Meanwhile, Knuckles, the last remaining echidna, sets out on a quest to find the shattered shards of the Master Emerald and restore it. Eggman also activates a new series of robots, the E-100 series, including Gamma. These robots are tasked with finding Froggy, a frog that has swallowed a Chaos Emerald. Froggy's owner, Big the Cat, embarks on his own mission to rescue his friend. At the same time, Sonic’s friend Amy encounters a bird, Flicky, who is being pursued for the Chaos Emerald it possesses. Determined to protect Flicky, Amy is captured, but she convinces Gamma to betray Eggman. Gamma helps her escape and then sets out to destroy the other robots in his series, ultimately sacrificing himself to free the animals trapped inside them. Meanwhile, Eggman prepares a backup plan to destroy Station Square with a missile strike, but Tails steps up in Sonic's absence and prevents the disaster, saving the city. Despite their efforts, Eggman succeeds in empowering Chaos with the Chaos Emeralds. Chaos transforms into Perfect Chaos, rebels against Eggman, and destroys Station Square. Through flashbacks from Tikal, Sonic learns that Chaos is driven by sorrow and rage, and that imprisoning it again won’t solve its torment. With the help of his friends, Sonic collects the Chaos Emeralds, harnesses their positive energy, and transforms into Super Sonic. In the final showdown, he defeats Perfect Chaos. Seeing the Chao now living peacefully, Chaos finally calms. Tikal then leads Chaos to a peaceful place where it can rest. As the city begins to recover, Sonic races off, ready for his next adventure. The Shadow and Space Colony ARK Incident (Sonic Adventure 2): Dr. Eggman uncovers a secret weapon hidden in the records of his late grandfather, Professor Gerald Robotnik, and infiltrates a high-security Guardian Units of Nations (GUN) facility to bring it back to life with the power of a Chaos Emerald. The weapon is Shadow, a black hedgehog who calls himself the "Ultimate Lifeform." Shadow agrees to assist Eggman in his plan to conquer the world, instructing Eggman to gather more Chaos Emeralds and meet him at the abandoned space colony, the ARK. Shadow, however, has his own goal: to fulfill a promise he made to his friend, Maria, before her death. The amnesiac Shadow interprets this promise as one of revenge. After stealing a Chaos Emerald, Shadow flees, but GUN mistakes Sonic for Shadow and arrests him. Meanwhile, Knuckles confronts Eggman and Rouge, a government spy, as they attempt to steal the Master Emerald. Knuckles prevents them by shattering the emerald, and he sets out to recover the scattered pieces. Rouge, still on her mission, follows Eggman to the ARK, where Shadow reveals the Eclipse Cannon, a powerful weapon created by Gerald. Shadow intends to use the Chaos Emeralds to power the cannon and take control of the world. Rouge gains Shadow and Eggman's trust by handing over a Chaos Emerald. Tails and Amy break into GUN's base and rescue Sonic. While this happens, Eggman, Shadow, and Rouge gather three more emeralds and destroy GUN's base to cover their tracks. Eggman then broadcasts a threat to the world, demanding recognition as its ruler or he will destroy the planet. He demonstrates the power of the Eclipse Cannon by obliterating half of the Moon. Sonic, Tails, and Amy, now joined by Knuckles, track the remaining Chaos Emeralds to the ARK. The team locates Eggman then heads for his Hidden Base in a nearby desert where they find a spaceship to the ARK. After arriving to the ARK, Knuckles goes off on his own and successfully repairs the Master Emerald. Onboard, Tails reveals that he has created a counterfeit Chaos Emerald with the intent of using it to destroy the Eclipse Cannon. Sonic tries to use the fake emerald but is stopped when Eggman captures Tails and Amy, forcing Sonic to return. When Sonic attempts to trick Eggman by swapping the fake emerald with the real one, Eggman sees through the plan and traps Sonic in an escape pod rigged with explosives. Using the fake emerald's power, Sonic narrowly escapes. Meanwhile, Rouge, after becoming aware of Knuckles arrival in the ARK, sets off to find the remaining pieces of the Master Emerald shards. After their encounter, they fight but Rouge ultimately gives up her pieces, leaving Knuckles to finally restore the Master Emerald, ending with a subtle bond. Shadow is dispatched to stop Sonic, while Eggman sneaks off with the final Chaos Emerald and activates the Eclipse Cannon. However, as the cannon is activated, the ARK begins to fall towards Earth. Gerald’s pre-recorded message is broadcast worldwide: the ARK was programmed to collide with Earth if the Chaos Emeralds were used, as revenge for the government shutting down his research and executing Maria and his colleagues. With time running out, everyone—except Shadow—works together to access the cannon's core to stop the ARK from crashing into Earth. Amy pleads with Shadow, reminding him of Maria's true wish, and he remembers that Maria wanted him to protect humanity, not seek revenge. Inspired by her words, Shadow joins the fight. Shadow meets Sonic and Knuckles in the ARK's core, where they confront the Biolizard, the prototype Ultimate Lifeform that was created before Shadow. Knuckles uses the Master Emerald to neutralize the Chaos Emeralds, but the Biolizard fuses with the Eclipse Cannon and continues the ARK’s descent. In their final effort, Sonic and Shadow use the power of the Chaos Emeralds to transform into their super forms. Together, they defeat the Biolizard and stabilize the ARK's orbit, saving the planet. However, the battle drains Shadow's energy, and he falls towards Earth, content with having fulfilled Maria’s true wish. As the people on Earth celebrate, Sonic and his friends return, with Sonic bidding a silent farewell to Shadow, who sacrificed himself to save the world. The Egg Utopia Incident (Sonic Advance 1 & 2): Prior to this, Dr. Eggman made another attempt to take over the world known as the X-Zone Incident, ending with a battle on the moon. Sometime later on an unspecified island, Dr. Eggman has begun another plan to build his Eggman Empire, kidnapping animals and turning them into robots. This time, however, he has also captured Sonic's close friends, Tails and Knuckles. Upon learning of their capture, Sonic sets out to rescue them. During his mission, Sonic encounters a young rabbit named Cream and her Chao companion, Cheese. Cream tells Sonic that her mother, Vanilla, has also gone missing. After Sonic defeats Eggman’s EggHammerTankII, he frees Cream and Cheese, and they join him in hopes of finding Vanilla. Sonic eventually rescues Tails, who has no idea what Eggman is planning. Tails then joins Sonic on his mission. When Sonic finds Knuckles, Eggman has deceived the echidna into believing Sonic is his enemy. After a brief fight, Sonic defeats Knuckles and clears the misunderstanding, prompting Knuckles to join the group to take revenge on Eggman. The team tracks Eggman to his Egg Utopia space station. Together, they destroy the station and put an end to Eggman’s plans. After the battle, Cream is joyfully reunited with her mother, Vanilla, who is safe. Later while Cream and her mother enjoy their reunion, Eggman returns in a cloaked mech and kidnaps Vanilla once more, taking her into space. Sonic and his friends arrive too late to stop the abduction, leaving Cream in tears. Determined to save Vanilla, Sonic transforms into Super Sonic and takes off after Eggman. In space (True Area 53), Super Sonic destroys Eggman’s mech and rescues Vanilla. During their return to Earth, the capsule holding Vanilla breaks apart, causing Sonic to revert to his normal form, but he manages to catch Vanilla and land safely. Cream tearfully reunites with her mother, and Sonic’s friends celebrate his victory. As they look around to thank him, Sonic has already slipped away, off in search of his next adventure. Egg Fleet/Neo Metal Sonic Incident (Sonic Heroes): Sonic, Tails, and Knuckles receive a letter from Dr. Eggman, announcing that in three days he will launch his Egg Fleet to take over the world, daring them to stop him. Meanwhile, Rouge infiltrates one of Eggman’s bases and is shocked to find Shadow, believed to have died after the events on the Space Colony ARK, asleep in a pod. After awakening him, she encounters E-123 Omega, a robot locked away by Eggman. The trio reluctantly forms a team, with Omega seeking revenge against Eggman, and Shadow, who has amnesia, wanting answers about his identity. Elsewhere, Amy teams up with Big and Cream to help find Big’s pet, Froggy, and Cheese’s brother, Chocola Chao, who have mysteriously gone missing. At the same time, the Chaotix Detective Agency—Vector, Espio, and Charmy—receive a mysterious job offer, where they complete a series of tasks to prove their abilities. All four teams chase down Eggman through different zones, often crossing paths with each other. Eventually, they converge on the Egg Fleet, where Rouge makes a startling discovery: an army of Shadow Androids, leading her to question if the Shadow she is traveling with is real. Meanwhile, the Chaotix's mysterious client is revealed to be none other than Eggman himself. Eggman explains that he had been locked up and betrayed by his own creation, Metal Sonic, who had taken on the identity of "Neo Metal Sonic" and seized control of the Egg Fleet. Neo Metal Sonic’s goal was to prove himself superior to Sonic by observing the various teams in action and collecting data. With enough data gathered, Neo Metal Sonic transforms into his ultimate form, the "Metal Overlord." Using the Chaos Emeralds collected by the four teams, Sonic, Tails, and Knuckles transform into their super forms and work together to defeat Metal Overlord. After an intense battle, Metal Overlord is defeated and reverts to his original form, Metal Sonic. In the aftermath, Sonic and the teams go their separate ways, while the Chaotix pursue Eggman, demanding the payment they were promised for their services. Emerl Incident (Sonic Battle): While studying his grandfather Professor Gerald Robotnik’s diary, Dr. Eggman uncovers the existence of an ancient sentient weapon called the Gizoid, created by a civilization 4000 years ago. The Gizoid, now dormant, is found by Eggman at Emerald Beach, but despite his attempts, he cannot get it to function properly. Frustrated, Eggman abandons the artifact. Sonic the Hedgehog soon stumbles upon the inactive Gizoid and awakens it after demonstrating his abilities, forming a bond with the weapon, which he names Emerl due to its ability to harness the power of Chaos Emeralds. As Emerl follows Sonic, he reveals his unique capability of perfectly mimicking any moves he witnesses. Emerl quickly becomes entangled with Sonic’s friends—Tails, Rouge, Knuckles, Amy, Cream, and even Shadow. As Emerl interacts with each of them, he learns concepts like friendship and gradually gains strength, intelligence, and independence with each Chaos Emerald he obtains. Sonic and his friends, recognizing Emerl's potential, embark on a journey to gather the remaining Chaos Emeralds to help him develop fully. However, Eggman, now realizing Emerl’s true power, attempts to reclaim him, sending a rebuilt E-102 Gamma and creating a series of flawed Emerl replicas called "E-121 Phi" to stop Sonic’s group. After collecting all the Chaos Emeralds, Emerl achieves full consciousness and becomes completely sentient. In one last attempt to control him, Eggman lures Emerl to the new Death Egg and battles him. Emerl triumphs, but Eggman uses his Final Egg Blaster to force Emerl into breaking his link with Sonic and transferring control to Eggman. The overload causes Emerl to malfunction, erasing his personality and sending him on a destructive rampage. The rogue Gizoid turns the blaster on Earth, threatening to destroy the planet. Sonic steps in to confront Emerl in a final battle. After defeating him, Emerl briefly regains his original personality and says a tearful goodbye to his friends before overloading with energy and exploding, leaving behind the shards of the Chaos Emeralds. Though devastated, Sonic reassures his friends that Emerl's essence still lingers and they will see him again someday. The Gemerl Incident (Sonic Advance 3): After the events involving Emerl, Dr. Eggman uses Emerl's data to create a new robot named Gemerl. Eggman shatters Earth into seven separate pockets of reality with Chaos Control, intending to conquer each section and establish the Eggman Empire. Sonic, stranded with Tails, sets out to reunite with his friends Knuckles, Amy, and Cream. Together, they journey through the fragmented zones, collecting Chaos Emeralds and battling Eggman’s machines to restore the world. Eventually, they confront Eggman and Gemerl at Altar Emerald, where they defeat the Hyper Eggrobo. Afterward, Gemerl betrays Eggman, seizing the Chaos Emeralds and transforming into Ultimate Gemerl. Sonic, using the Emeralds, becomes Super Sonic and, in a surprising alliance with Eggman, defeats the rampaging Ultimate Gemerl. The battle ends with Gemerl reverting to normal and exploding. After the dust settles, Cream and her mother find Gemerl’s body on a beach. They bring him to Tails, who repairs and reprograms him into a friendly companion. Gemerl then gets to live a peaceful life with Cream and her family, leaving Sonic to continue his adventures and Knuckles to resume guarding the Master Emerald. The Black Arms Incident and Shadow’s Dilemma (Shadow the Hedgehog): While brooding outside of Westopolis, Shadow is lost in thought, trying to piece together his fragmented memories. Suddenly, the sky darkens, and an alien invasion begins. Reluctant to act, Shadow is approached by Black Doom, leader of the invading Black Arms, who cryptically tells him to fulfill a promise by bringing him the seven Chaos Emeralds. Confused by how Black Doom knows him, Shadow sets out to find the Emeralds and uncover the truth. Caught in the midst of a battle between GUN soldiers and the Black Arms, Shadow encounters Sonic, who urges him to help stop the aliens from destroying the city. During his journey to collect the Chaos Emeralds, Shadow also encounters Doom’s Eye, a servant of Black Doom, who orders him to attack the GUN forces. Torn between helping the Black Arms, aiding GUN in defending humanity, or following his own path to find the Emeralds, Shadow grapples with conflicting motivations. GUN Commander Abraham Tower, harboring a deep resentment toward Shadow for the deaths of Maria and the ARK’s inhabitants 50 years ago, orders his forces to eliminate Shadow on sight. Meanwhile, the President of the United Federation calls for humanity to unite against the alien threat, and Dr. Eggman, fearing that the Black Arms will disrupt his plans for world domination, deploys his Egg Fleet to fight both GUN and the aliens. As Shadow’s internal conflict deepens, he questions whether to trust Black Doom, join forces with Sonic and GUN to save the world, or confront Eggman to uncover the truth about his origins. Believing that the Chaos Emeralds hold the key to understanding his past, Shadow is haunted by memories of the ARK and Maria’s death, pushing him further toward a decision. The Truth Behind Shadow’s Creation: As Shadow continues his search, Black Doom manipulates him by invoking the traumatic events on the ARK, including GUN’s raid and Maria’s death. Seizing the opportunity, Eggman reveals an army of Shadow Androids, furthering Shadow’s doubts about his true identity. The existence of these androids had been hinted at during the Neo Metal Sonic incident, fueling Shadow’s fears that he may not be the original. Later, Commander Tower confronts Shadow on the ARK, revealing a shocking truth: 50 years ago, Professor Gerald Robotnik made a deal with Black Doom, using the alien’s DNA to create Shadow in exchange for the Chaos Emeralds. This pact led to the tragic ARK incident and Maria’s death. Black Doom confirms this, admitting that his blood was used to create Shadow, explaining why Shadow is immune to the Black Arms' paralysis gas. After Shadow collects all seven Chaos Emeralds on the Black Comet, Sonic and his allies—Tails, Knuckles, Amy, Rouge, and even Eggman—try to convince him not to give the Emeralds to Black Doom, who plans to use them to destroy the planet. Despite their efforts, Black Doom seizes the Emeralds and pulls the Black Comet into Earth's atmosphere, preparing for the world's destruction. As Sonic and his friends attempt to fight back, Black Doom unleashes a paralyzing gas, freezing everyone in place except for Shadow, who is immune due to his connection to Black Doom’s blood. As Black Doom attempts to fully control Shadow’s mind, boasting that Shadow can never escape his past, the Chaotix manage to hack into the ARK’s data and uncover a recording left by Professor Gerald Robotnik. The message reveals that Gerald built the Eclipse Cannon not for conquest, but to destroy the Black Comet and stop Black Doom’s invasion. Gerald entrusts Shadow with the mission to save the world, reminding him of Maria’s true wish for him to protect humanity. Shadow’s Final Showdown with Black Doom: Despite Black Doom’s efforts to control him, Shadow resists, realizing his true purpose. Black Doom transforms into his ultimate form Devil Doom, determined to destroy Shadow and complete his conquest. In response, Shadow gathers the seven Chaos Emeralds and transforms into Super Shadow, ready for their final battle. In a climactic showdown, Shadow defeats Devil Doom and uses Chaos Control to warp the Black Comet into space, before completely destroying it with the Eclipse Cannon. The world rejoices at the end of the alien threat, with Sonic and his friends congratulating Shadow. Meanwhile, President and Commander Tower vow to honor Professor Gerald’s legacy by building a better future. Aboard the ARK, Shadow reflects on his past while looking at a photo of Maria and Professor Gerald Robotnik. Now at peace with who he is and what he was meant to do, he discards the photo and walks away, saying, “Goodbye forever... Shadow the Hedgehog,” as he leaves his past behind and moves toward an uncertain but hopeful future. The Dimensional Merge Incident (Sonic Rush): Blaze the Cat, originally from her own dimension, is suddenly pulled into Sonic’s world. In her dimension, there were seven Sol Emeralds, akin to the Chaos Emeralds, but these have been stolen by Doctor Eggman. Determined to recover them, Blaze sets off on her mission. Along the way, she meets Cream the Rabbit, and is struck by her politeness and kindness. Meanwhile, Sonic is also on a search, but for the Chaos Emeralds, which have been taken by Eggman Nega, Doctor Eggman’s counterpart from the future, who was residing in Blaze’s dimension. During Sonic’s search, he briefly encounters Blaze, but before he can ask her any questions, she leaves. Later, Tails discovers that the two dimensions—Blaze’s and Sonic’s—are merging, and if nothing is done, both will collapse. Suspicious of Blaze’s motives, Sonic and Tails set out to find her. They eventually track her down, with Cream by her side, and Sonic tries to confront her about what is happening. However, Blaze is evasive, refusing to explain anything and choosing to leave with Cream. Sonic follows her to Eggman Nega’s base, where it is revealed that Eggman and Eggman Nega are working together, aiming to collect both the Chaos and Sol Emeralds. Blaze, insisting she is the only one capable of saving both worlds, believes she doesn’t need anyone’s help. This leads to a clash between Sonic and Blaze, where Sonic eventually wins, helping Blaze realize her mistake in pushing others away. When Eggman kidnaps Cream, Blaze chases after him while Sonic goes after Eggman Nega. Sonic gathers the last Chaos Emerald, and meets up with Blaze just in time as she is unable to stop the two villains from using the Sol Emeralds to power their Egg Salamander mech. As the dimensions begin to destabilize, Sonic and his friends help Blaze understand the importance of friendship and trust. This restores the Sol Emeralds to their full power, allowing Blaze to transform into Burning Blaze, while Sonic becomes Super Sonic. Together, they defeat the Egg Salamander, and the dimensions return to normal. Blaze, now with a better understanding of her powers and the value of friendship, returns to her dimension. Cream is saddened by her departure, but Sonic reassures her that Blaze has promised to return someday. The Babylon Garden Incident (Sonic Riders): Jet, leader of the Babylon Rogues, is fascinated by the Key to Babylon Garden, an ancient artifact and family heirloom believed to unlock the mysteries of their Babylonian ancestors. Doctor Eggman approaches the Rogues, claiming that with the power of the Chaos Emeralds, he can resurrect Babylon Garden, and asks for their assistance in collecting the Emeralds. The Rogues agree to help and manage to steal an Emerald, but they soon encounter Sonic, Tails, and Knuckles, who are also hunting for the Emeralds. Sonic chases after Jet, but Jet successfully escapes with the stolen Emerald. The following day, Sonic and his friends see Eggman on a digital billboard promoting an Extreme Gear race, the EX World Grand Prix, where participants must wager a Chaos Emerald to enter, with the winner receiving all seven. Upon learning that the Babylon Rogues are competing, Sonic, Tails, and Knuckles decide to enter the race as well. They are later joined by Amy Rose, who is eager to compete. Throughout the races, Sonic and his friends face off against the Rogues in intense Extreme Gear competitions. However, during the final race, Wave sabotages Sonic's board, giving Jet the upper hand to win the Grand Prix. Jet then uses the Chaos Emeralds to raise Babylon Garden from the depths, hoping to uncover the treasure of the Babylonians. Meanwhile, Eggman, intent on taking the treasure for himself, steals the Key from Jet and heads toward the garden. Amy grabs onto Eggman's ship in an attempt to stop him, while Sonic quickly takes a new board and pursues Eggman. Jet, determined to defeat Eggman first, challenges Sonic to another race. Both Jet and Sonic arrive at Babylon Garden, where Eggman is holding Amy hostage. Working together, Jet and Sonic retrieve the Key and rescue Amy. Jet then uses the Key to unlock a hidden door, leading the Rogues to the heart of a Babylonian ruin. Team Sonic follows them inside, where they are confronted by the Babylon Guardian, a massive creature tasked with protecting the treasure. Together, both teams defeat the Guardian, causing a chest to appear. Eggman reappears, demanding the treasure, but collapses in confusion when the treasure turns out to be a simple carpet. However, Jet uses the Key to activate the carpet, revealing it to be an ancient flying device, an early form of Extreme Gear. With the mystery solved, Team Sonic and the Babylon Rogues part ways, with Jet promising to race Sonic again in the future. The Ark of the Cosmos Incident (Sonic Riders: Zero Gravity): The Babylon Rogues uncover an Ark of the Cosmos, one of five relics capable of controlling gravity, with plans to use all of them to power Babylon Garden’s warp engine. Meanwhile, other Arks begin to fall from the sky, one of them striking the Crimson Tower, a key structure of the technology company MeteoTech. The impact causes MeteoTech’s robots to malfunction and go on a global rampage. Sonic, traveling with Tails and Knuckles, stumbles upon one of the Arks but is quickly attacked by the rogue robots. Using the Ark’s power, Sonic manages to escape, but the group is pursued. They run into Amy, who has also found one of the Arks, and together, the four head to MeteoTech to investigate the situation. At MeteoTech, the group encounters the Babylon Rogues. Storm, one of the Rogues, attempts to take Amy’s Ark and chases after her, while the rest of the group ventures deeper into the facility. There, they find the company's owner, Doctor Eggman, who reveals that a robot named SCR-HD was struck by one of the Arks, gaining sentience and becoming the leader of the malfunctioning robots. The robots now seek to collect all five Arks, and Eggman admits he has already used one to power the mother computer that controls all of MeteoTech. Amy reluctantly hands over her Ark of the Cosmos to Storm, but they are soon attacked by a robot. After the robot is destroyed, Storm discovers another Ark inside and takes off to reunite with Jet. Meanwhile, Eggman steals the Rogues' collected Arks and makes his way to Crimson Tower, intending to use the Arks to control all the world’s robots. The Babylon Rogues pursue Eggman, while Sonic and his team retrieve Amy and head to Crimson Tower to stop the mother computer. Upon arriving at the tower, they encounter the Babylon Rogues once again. Jet challenges Sonic to a final race, with the winner taking all the Arks. The two race to the top of the tower, reclaim the Arks, and shut down the rampaging robots. As the Arks resonate, Babylon Garden is summoned, and Sonic hands over the Arks to Jet. Before they can leave, SCR-HD appears, seizes the Arks of the Cosmos, and retreats to Babylon Garden. There, SCR-HD activates the Arks, revealing an ancient spaceship within the garden and creating a massive black hole that threatens to destroy the planet. SCR-HD transforms into a powerful robot called Master Core ABIS. While Eggman escapes, the heroes and the Rogues team up to defeat ABIS using Gravity Dives, ultimately shutting down the Arks and stopping the black hole. The ancient ship is left adrift in space. In the aftermath, Tails speculates that the Babylonians’ ancestors were aliens who lost control of their spaceship. They scattered the Arks into orbit to stop it, hoping the relics would one day return to the surface, allowing them to restore the ship and return to their home planet. With the crisis averted, Jet challenges Sonic to another race, and Sonic eagerly accepts. The Solaris Incident (Sonic the Hedgehog 2006): Dr. Eggman kidnaps Princess Elise of Soleanna, aiming to exploit the destructive power known as the Flames of Disaster, sealed within her. With the help of his friends Tails and Knuckles, Sonic sets out to rescue Elise from Eggman’s clutches. Meanwhile, Shadow and his partner Rouge, along with Eggman, accidentally unleash an evil spirit named Mephiles. Mephiles transports Shadow and Rouge to a future devastated by a monstrous force, Iblis. Manipulating the situation, Mephiles convinces survivors Silver and Blaze that Sonic is the cause of their world's destruction, sending them back in time to eliminate him. As the story unfolds, Sonic and his allies travel through the past, present, and future in their efforts to thwart Mephiles and Iblis while also protecting Elise from Eggman. Silver initially hunts Sonic, believing him to be responsible for the apocalypse. However, Shadow reveals that Mephiles, not Sonic, is the true cause of the devastation, as Mephiles intends to alter the past for his own dark purposes. The group journeys ten years into the past, discovering that Mephiles seeks to reunite with Iblis, who was sealed within Elise when she was a child. Mephiles and Iblis are two halves of Soleanna's god, Solaris. Mephiles succeeds in his plan by killing Sonic, causing Elise to cry and release the seal on Iblis. Using the Chaos Emeralds, Mephiles merges with Iblis to become Solaris, an all-powerful being that threatens to consume time itself. The heroes, along with Elise, gather the Chaos Emeralds and use their power to revive Sonic. Sonic, Shadow, and Silver transform into their super forms and confront Solaris in an epic battle, eventually defeating him. After the battle, Sonic and Elise travel back to the past and extinguish the flame of Solaris, erasing the god from existence and preventing the events from ever happening. Although the timeline is reset, Sonic and Elise experience faint memories of their adventure, hinting at a connection that remains even after the events have been undone. The Onyx Island Incident (Sonic Rivals): When the mysterious Onyx Island suddenly appears, Sonic and Tails fly there to investigate, only to encounter Dr. Eggman, who unveils his latest invention: a camera capable of transforming people and objects into cards. Eggman has already captured Amy this way and, before Sonic can react, turns Tails into a card as well. Just then, Knuckles arrives, furious to learn that Eggman has used the device on the Master Emerald. Declaring his plan to conquer the world by turning everything into cards, Eggman challenges Sonic and Knuckles to stop him before making his escape. The two heroes set off independently to foil his scheme. Meanwhile, Shadow receives an urgent distress signal from Eggman, but when he locates him, the doctor denies ever sending it. Later, Rouge contacts Shadow, warning that she’s uncovered a dangerous secret about Eggman, but she is turned into a card before she can reveal anything. At that moment, Silver arrives from the future and tells Shadow that he must get to Eggman before it’s too late. As they investigate further, the heroes discover that the real Dr. Eggman has been trapped in a card all along. The Eggman they’ve been dealing with is actually Eggman Nega in disguise. Nega has traveled back from the future to use the camera to erase Eggman’s failures from existence and alter their family’s legacy. Onyx Island, a future version of Angel Island that Nega brought back, plays a key role in his plan. With his true identity revealed, Nega flees to a space station, where he plans to use the camera to transform the entire planet into a card. The heroes free Tails and the real Eggman, who assist them in reaching Nega’s space station. After a fierce final battle, they defeat Nega, capturing him in a card. With Nega contained, the camera's effects are reversed, freeing everyone previously trapped. Silver then takes Onyx Island and the card containing Nega back with him to the future, restoring peace once more. The Ifrit Incident (Sonic Rivals 2): Sonic and Tails start investigating the mysterious disappearance of several Chao, soon discovering that Dr. Eggman has hidden them inside a haunted mansion. He intends to feed them to an interdimensional beast called the Ifrit, which will make it unstoppable. Once the Ifrit is empowered, Eggman plans to release it to destroy the world. To open a portal to the Ifrit’s dimension, he needs the seven Chaos Emeralds and secretly hires Rouge to help collect them. Meanwhile, when the Master Emerald also vanishes, Knuckles teams up with Rouge to recover it. In the meantime, Silver the Hedgehog arrives from a future ruined by the Ifrit. Determined to change this outcome, he starts taking the Chao and hiding them for safety. Espio, hired to investigate the Chao disappearances, initially suspects Silver is behind it all, but ultimately teams up with him after learning of his real mission. Elsewhere, Shadow encounters Metal Sonic, who reveals that the real villain is Eggman Nega, disguised as Eggman, and that he uncovered the Ifrit’s existence through Gerald Robotnik’s journals. Shadow and Metal Sonic rush to retrieve the Chaos Emeralds before Nega can use them. Eventually, all the heroes meet at the haunted mansion to face Nega. Even though Rouge has only managed to gather six Chaos Emeralds, the portal to the Ifrit’s realm opens. Nega sends his creation, Metal Sonic 3.0, to awaken the Ifrit. Though the creature tries to control the minds of their friends, the heroes successfully defeat it. Shadow and Metal Sonic then seal the portal, trapping themselves and Nega in the Ifrit’s dimension. But with the seventh Chaos Emerald hidden within Metal Sonic, Shadow uses it to teleport them back, leaving Nega stranded. Sonic and Tails free the Chao, returning them to a Chao Garden to rest. Knuckles uses Nega’s Emerald Detector to find the Master Emerald, only for Rouge to steal it and dash away. Silver returns to his future, hopeful that the changes have restored it, while Espio updates Vector on the outcome of their mission. The Jeweled Scepter Incident (Sonic Rush Adventure): Sonic and Tails are on an adventure when they detect a powerful energy signal coming from a remote island. They set out in the Tornado, but a sudden storm hits, and they're pulled into a massive vortex, causing them to crash on the island. Upon waking, they meet Marine, an enthusiastic raccoon with dreams of becoming a sailor. Sonic and Tails decide to help Marine build a boat so they can explore the surrounding islands, where they quickly encounter a group of pirates led by the robotic Captain Whisker. The pirates are on a quest to find an ancient artifact called the Jeweled Scepter, which is said to contain immense power. During their search for Whisker, Sonic and Tails unexpectedly meet Blaze the Cat. She reveals that they have crossed dimensions into her world, where she has been trying to protect the Jeweled Scepter from falling into the wrong hands. Despite their best efforts, Whisker manages to escape with the Scepter, forcing Sonic and Blaze to team up to get it back. Together with Marine, they set out on Marine’s newly-built waterbike, navigating through a series of treacherous islands and chasing after the pirates. After a fierce battle with Captain Whisker and his right-hand robot, Johnny, Sonic and Blaze manage to take down the pirates' strongest weapon, the Ghost Titan, on their ship. Marine, who was briefly captured, reveals that she stole back the Jeweled Scepter in the confusion, and they all head back to Southern Island to regroup. As they return to Southern Island, they are constructing a plant to return Sonic and Tails. They are then interrupted by a powerful earthquake that shakes the island, and Dr. Eggman and Eggman Nega appear. They reveal that they orchestrated the entire quest to get their hands on the Jeweled Scepter and that they've discovered a hidden power source beneath Southern Island, which they plan to use to dominate both dimensions. Tails quickly constructs a powerful digging machine, the Magma Hurricane, to reach the underground source before Eggman and Nega can unleash their plans. However, the villains use the Jeweled Scepter to power their ultimate mech, the Egg Wizard. Sonic and Blaze use the Chaos and Sol Emeralds to transform into Super Sonic and Burning Blaze, respectively, and they face off against the Egg Wizard in an intense battle. Eggman Nega attempts to blow up the entire island, but Marine intervenes with a surprise attack, distracting him long enough for Blaze to land a critical blow. Super Sonic then charges through the Egg Wizard, destroying it once and for all. With the threat neutralized, the group discovers that the Emeralds had brought them together to save both worlds. Tails finishes building a new ship, the SS Tornado EX, and Sonic bids Blaze farewell, thanking her for her friendship and promising to meet again. As Sonic and Tails set off, Marine catches up on her own boat, the SS Super-Marine, to say goodbye. In a post-credits scene, Blaze and Marine watch the sunrise on Southern Island, reflecting on their adventure and newfound bond. The Dark Gaia Incident (Sonic Unleashed): Sonic the Hedgehog confronts Dr. Eggman aboard his flagship in space. Eggman unleashes a barrage of attacks, deploying cannons and a fleet of Egg Fighters. Sonic races through the obstacles, narrowly dodging gunfire and missiles, and even runs across the flagship's ceiling. As he closes in, Eggman ensnares him with a grappling hook. But Sonic calls on the power of the Chaos Emeralds, transforming into Super Sonic. He swiftly dismantles Eggman’s mech, forcing the doctor to flee in his Egg Mobile. The chase leads to Eggman’s research facility, where Sonic ultimately corners him. In a moment of deception, Eggman pretends to surrender, only to trap Sonic in a Chaos Energy Cannon that painfully drains the power from the Chaos Emeralds, transforming them gray and powerless while corrupting Sonic into a Werehog. Eggman then ejects Sonic and the drained Emeralds into space, sending them plummeting back to Earth. Upon landing, Sonic finds himself disoriented but alive, thanks to a mysterious energy that cushioned his fall. He meets a winged, imp-like creature with no memory of who he is. Sonic names him Chip and agrees to help him recover his lost memories. They soon encounter Tails in the city of Apotos. Tails, recognizing Sonic despite his Werehog form, directs them to Professor Pickle at Spagonia University, who might hold answers to their predicament. When they arrive, they discover that Eggman has kidnapped Professor Pickle, hoping to leverage his knowledge about Dark Gaia. After rescuing him, Professor Pickle explains that Dark Gaia's release fractured the world, and the only way to restore it is to re-power the Chaos Emeralds by visiting the Gaia Temples. As Sonic and Chip journey across continents, they encounter familiar faces, including Amy, who at first doesn’t recognize Sonic in his transformed state. Along the way, Sonic saves her from Dark Gaia’s influence, and upon realizing who he is, Amy decides to join their mission. Meanwhile, Eggman accelerates his plans, seeking to reassemble Dark Gaia and complete his ultimate project: Eggmanland. When Sonic restores the sixth Chaos Emerald, Chip suddenly regains his memories. He reveals that he is Light Gaia, the eternal counterpart to Dark Gaia. Both entities were meant to awaken periodically in an ancient cycle, but Eggman’s premature release of Dark Gaia disrupted this balance. Sonic and Chip then press forward to the final Gaia Temple, which Eggman has built into the core of Eggmanland, fueled by Dark Gaia's power. After restoring the last Emerald and defeating Eggman’s latest mech, Dark Gaia reaches full maturity by absorbing the dark energy from Sonic’s Werehog form. Chip summons the Gaia Colossus, a massive stone titan, to aid Sonic in the battle. With Sonic riding atop the Gaia Colossus, they fight against Dark Gaia, but the beast eventually submerges the world in darkness, achieving his ultimate form, Perfect Dark Gaia. With renewed strength from the restored Chaos Emeralds, Sonic transforms into Super Sonic and, with Chip’s help, defeats Dark Gaia once and for all. The victory drains Sonic of his energy, but as the continents realign, Chip uses his last strength to throw Sonic back to safety. When Sonic awakens, he finds Chip’s necklace on the ground along with a farewell message. Sonic turns the necklace into a bracelet as a memento of their journey. The adventure concludes as Sonic joins Tails in the Tornado, setting off for whatever awaits them next. The Interstellar Amusement Park Incident (Sonic Colors): Dr. Eggman invades several planets inhabited by the Wisps, mysterious alien creatures powered by Hyper-go-on energy, and anchors them to an enormous interstellar amusement park called "Egg Planet Park." He falsely claims that he created the park as a gesture of goodwill to atone for his past misdeeds. Suspicious of Eggman’s motives, Sonic and Tails arrive at the park just before its grand opening to investigate. They soon discover that Eggman plans to harness the Wisps' energy for his own gain. Sonic, who can channel Hyper-go-on energy to gain unique "Color Powers," teams up with a Wisp named Yacker. With the help of Tails' Miles Electric, they communicate with Yacker and set out to free the Wisps and dismantle Eggman’s scheme. Guided by Yacker, Sonic and Tails explore the various attractions of Egg Planet Park, systematically shutting down the tractor beams anchoring each planet to the park. During their mission, Tails briefly falls under Eggman's mind control. The heroes later learn that Eggman plans to use the Wisps as fuel for a massive mind control cannon to conquer the universe. He's been transforming them into Nega-Wisps to power the weapon, with Earth as his first target. After liberating all of the planets, Sonic and Tails watch as Eggman attempts to fire the mind control cannon at Earth. However, a piece of debris from a previous battle causes the cannon to malfunction and explode, creating a Hyper-go-on void that begins to consume the entire park. Sonic sends Tails back to Earth and confronts Eggman in a final showdown. Although he defeats Eggman, Sonic gets caught in the void. The Wisps use their energy to neutralize the void, restore the Nega-Wisps, and safely return Sonic to Earth. Sonic reunites with Tails, and they bid farewell to the Wisps as they head home, leaving Eggman stranded in space. Back on Earth, Yacker returns with a plea for help. Eggman's tampering has corrupted Mother Wisp, transforming her into the monstrous Nega-Mother Wisp. Sonic, having collected all seven Chaos Emeralds, transforms into Super Sonic and takes on the Nega-Mother Wisp in an epic battle. After Sonic restores her to her original form, Mother Wisp thanks him, and she and the other Wisps return their planets to their rightful places in the universe. The Time Eater Incident (Sonic Generations): The story opens with Classic Sonic running through Green Hill Zone when an ominous entity known as the Time Eater suddenly appears, causing an earthquake and plunging everything into white light. In the present, Tails joins Sonic for a surprise birthday party organized by their friends. But just as the celebration begins, the Time Eater appears, creating Time Holes and scattering everyone across various timelines. Modern Sonic tries to attack the creature but is knocked unconscious. Sonic awakens in White Space, a strange, blank dimension, and notices a colorless version of Green Hill Zone along with a statue-like, gray Tails. Racing through Green Hill, Sonic restores color and life to the area, bringing Tails back to normal. They soon realize they’re not alone, as Classic Sonic arrives and begins exploring Chemical Plant Zone. Though they’re unaware of each other’s presence, both Sonics start restoring the different zones, bringing life back to them and rescuing Amy along the way. After rescuing Knuckles from Sky Sanctuary, Classic Sonic heads to Stardust Speedway and defeats Metal Sonic, securing a Chaos Emerald. The Sonics then unknowingly encounter each other in a Boss Gate, initially mistaking each other’s reflections for mirrors. Classic Sonic faces off against Classic Eggman in the Death Egg, but after the battle, Eggman is snatched away by the Time Eater. As the Sonics finally meet, they join forces with Classic and Modern Tails, realizing they’re journeying through time and space. Together, they vow to stop the Time Eater and save their friends. As they proceed, the Sonics save Cream and Cheese from Speed Highway, Rouge from City Escape, and Espio from Seaside Hill. They soon learn from Tails that the Time Eater is ripping through time and disrupting the universe. Onward, Modern Sonic encounters Shadow on the ARK, defeating him to obtain another Chaos Emerald. He then battles Perfect Chaos in Station Square. By now, the group realizes the Chaos Emeralds are essential to stopping the Time Eater. In their adventure, the Sonics restore Crisis City, Rooftop Run, and Planet Wisp, rescuing Blaze, Vector, and Charmy along the way. Afterward, Modern Sonic defeats Silver in Crisis City and secures another Chaos Emerald. Later, he faces Modern Eggman in Eggmanland, only to see him taken by the Time Eater as well. With all seven Chaos Emeralds collected, the Sonics and Tails confront the Time Eater and uncover its true nature: both Classic and Modern Eggman are controlling it. Modern Eggman explains that he discovered the Time Eater in its early form while drifting through space after the events of Egg Planet Park. Recognizing its power to manipulate time, he modified it to erase his past defeats by altering history. For this, he enlisted Classic Eggman’s help. Confident in their plan, the Eggmen are surprised when the two Sonics engage in battle. Although the Time Eater nearly overpowers them, the support of their friends activates the Chaos Emeralds, enabling the Sonics to transform into their Super forms. In a final showdown, Super Sonic and Classic Super Sonic destroy the Time Eater and restore the timeline. Returning to the present, the group resumes the birthday celebration, where Modern Sonic encourages Classic Sonic, who tries (and hilariously fails) to perform the Boost. With a friendly farewell, Classic Sonic and Classic Tails use a Time Hole to return to their own timeline, with Modern Sonic promising them a great future ahead. Meanwhile, both Eggmen find themselves lost in White Space, bickering about their defeat. Classic Eggman contemplates getting a teaching degree, which Modern Eggman considers not a bad idea, given his love for ordering people around. The Lost Hex Incident (Sonic Lost World): While pursuing Dr. Eggman, who has somehow returned from White Space, Sonic and Tails pilot the Tornado to intercept him. Eggman taunts them with a capsule full of captured animals but, instead of releasing them, sends the capsule plummeting. Sonic dashes off the plane to try to save them, but before he can, Eggman fires a laser at the Tornado, forcing the two to make an emergency landing on the floating continent known as Lost Hex. As Sonic and Tails explore, they learn that Eggman has enslaved a group called the Deadly Six. When Eggman commands the Six to eliminate Sonic, Zazz takes the lead, and Sonic defeats him at Windy Hill. After fixing the Tornado, Sonic heads to Desert Ruins, where he confronts Zomom, another member of the Deadly Six. Here, Sonic discovers that Eggman is controlling the Deadly Six with a Cacophonic Conch. However, when Sonic impulsively kicks the conch away, the Deadly Six seize control of Eggman’s Badniks, turning them against their creator. Sonic and Tails, alongside Eggman, narrowly escape. In Tropical Coast, Sonic faces Master Zik, the oldest Zeti, while the Deadly Six enact a plan to drain the Earth’s energy using a machine called the Extractor, which Eggman built to “borrow” the worlds energy, whereas the Zeti want to destroy the world with it. Despite knowing the machine’s instability, they reactivate it. Sonic teams up with Eggman, reluctantly trusting him to help stop the Six, despite Tails’ misgivings. Tensions rise as Sonic and Tails argue in Frozen Factory, especially after Tails accuses Sonic of trusting Eggman more than him. As the Six plan to turn Sonic into a robotic slave, Tails is captured while saving Sonic from a trap in Silent Forest. The Deadly Six reprogram the robotizer to turn Tails into one of them. Meanwhile, Sonic confronts Zor and vows to rescue Tails. Orbot offers to be Sonic’s sidekick, but Sonic rejects him, determined to find Tails. In Sky Road, Sonic battles Zavok, who plans to force Tails to attack Sonic. However, Tails, using his wits, reprograms the machine and regains control just as Sonic arrives. When Sonic reaches Lava Mountain, he faces off against Zazz, Zomom, and Master Zik. After seeing Amy weakened by the energy drain, Sonic becomes desperate, only to encounter a seemingly robotic Tails who manages to fight off the Deadly Six. The Deadly Six are ultimately defeated, but Eggman reveals he faked his death during an earlier confrontation to secretly harness the Extractor’s power. He unveils a giant mech to take over the world, but Sonic defeats him in a final showdown. Tails reprograms the Extractor, restoring the Earth’s energy, and Sonic apologizes to Tails for doubting him. The Infinite Incident (Sonic Forces): One month before the events that would reshape everything, Shadow the Hedgehog receives a call from Rouge the Bat. She reports a mysterious Eggman base, well outside the doctor’s usual territory. Rumors suggest Eggman is developing a weapon of unimaginable power. Shadow sets out to investigate, expecting backup from E-123 Omega, whom Rouge sent ahead. But before he arrives, Omega has already launched an all-out assault on the base. Soon after, Shadow and Rouge lose all communication with him. As Shadow reaches the base, he encounters a new and formidable enemy: Infinite. Shadow does not recognize him, but Infinite clearly knows Shadow. He reveals his past—once a mere mercenary leader, now transformed into something monstrous after a devastating encounter with Shadow that left him broken and humiliated. In the aftermath, he abandoned his former self and surrendered to the powers of the Phantom Ruby prototype, emerging as a creature of limitless power. Infinite traps Shadow in a warped virtual reality, testing his new powers, but Shadow narrowly escapes. Though Shadow is left unsettled, Infinite is pleased; he knows his power will be enough to bring even Sonic to his knees. As the base begins to explode, Infinite vanishes into the chaos, leaving Shadow with far too many questions and no time to find answers. One month later, Rouge contacts Shadow again. Eggman has launched a brutal assault on the City. Initially dismissive, Rouge’s tone shifts when she reports that Sonic has been defeated—crushed by Infinite and an army of twisted Phantom Copies. The Resistance, already decimated, is helpless against this relentless force. Eggman has been preparing for years, quietly forging his ultimate weapon. Now, with Orbot and Cubot at his side, he has unleashed devastation on a scale the world has never seen. With Sonic out of the picture, the Eggman Empire spreads like wildfire, consuming over 99% of the Earth in just six months. In Sonic’s absence, those who survived form a desperate Resistance, led by Knuckles. Amy, Team Chaotix, Rouge, and Silver fight from the shadows, barely hanging on. But even this fractured resistance offers little hope. Tails, broken by the loss of his closest friend, vanishes, leaving the others to fend for themselves. As the Resistance clings to survival, they gain a new recruit—a rookie, a lone survivor of a prior encounter with Infinite, still haunted by the memories. When Rouge discovers Sonic is still alive, held prisoner aboard the newly rebuilt Death Egg, Knuckles leads a high-risk operation to free him. Meanwhile, Tails, wandering the ruins of the City, tries in vain to repair Omega, only to be confronted by Chaos. Just as he is about to be struck down, Classic Sonic, drawn into this nightmare through a mysterious wormhole (transported here from his time as a result of the Phantom Ruby Incident) arrives and saves him. Together, Tails and Classic Sonic team up, though Tails can’t shake the sense of a world unrecognizable and lost. Back at the Death Egg, the rookie breaches the facility, fighting through waves of enemies, but Sonic is too weak to break free. A phantom version of Zavok appears, eager to finish the job, but Sonic, barely clinging to life, manages to break his restraints and confront him. Sonic and the rookie then escape the Death Egg together, but Sonic is haunted by what he’s seen—the ghosts of his old enemies and a world that barely resembles the one he knew. Eggman’s plan grows darker. Infinite, wielding the Phantom Ruby’s power, warps reality and tears open rifts between worlds. He brings illusions of Sonic’s greatest foes into existence—twisted doppelgängers that fight with an intensity and hatred far greater than anything the real ones had. When Sonic encounters Shadow, it is not the Shadow he knows, but a hollow replica, warped and consumed by Infinite’s power. Shadow eventually arrives and dispels his impostor, revealing that the villains Sonic faces are nothing more than phantoms, conjured to break him piece by piece. As they attempt a final assault on Eggman’s fortress, Knuckles’ Resistance is decimated, suffering massive losses. But the rookie, remembering Sonic’s encouragement, confronts Infinite alone, who toys with the fledgling hero, enjoying the thrill of watching hope crumble. But the rookie’s courage holds fast, and Infinite is left confused, a strange flicker of doubt in his otherwise impenetrable confidence. Tails and Classic Sonic finally uncover the secret to Infinite’s power. The Phantom Ruby draws its strength directly from the Death Egg’s core. Together, they manage to destroy the Death Egg, leaving the Resistance with a glimmer of hope. But Eggman has prepared for this, his true plans hidden beneath the surface. The Death Egg’s destruction was a mere inconvenience, one he anticipated. He activates a massive backup power supply for the Ruby beneath Metropolis, and when Sonic and the rookie try to confront him, he banishes them into Null Space, an endless void where escape is all but impossible. Together, Sonic and the rookie manage to break free, fighting their way back to the Resistance. In a final, desperate push, the Resistance storms the Eggman Empire Fortress. Infinite, no longer interested in games, conjures a massive sun to annihilate them all. As the orb of fire descends, Tails realizes that the rookie’s Phantom Ruby prototype might be their only hope. With all the courage they can muster, the rookie faces Infinite one last time, destroying the sun and finally breaking his power. Infinite, furious and broken, vanishes. But the victory is fleeting. Eggman reveals that the power source they destroyed was a decoy. He unveils his final weapon—a colossus armed with the original Phantom Ruby, his Death Egg Robot. Sonic, Classic Sonic, and the rookie fight their way through an endless army of phantom copies, taking on the Death Egg Robot in a brutal final battle. With every ounce of strength they have left, they bring it down. As the dust settles, Eggman’s army dissolves, leaving the Resistance triumphant, but forever scarred. In the aftermath, Classic Sonic returns to his time, vanishing without a trace. The rookie, forever changed by the horrors they’ve faced, goes their own way, leaving Knuckles to disband the Resistance. But as the heroes part, the world they fought for feels hollow, the scars of war haunting every step. Sonic, too, departs, with the sense that this is only the beginning of something far darker—a world left teetering on the edge of ruin, its future uncertain. Dodon Pa's Grand Prix Incident (Team Sonic Racing): The Invitation to the Ultimate Test of Racing Skill begins as Team Sonic—Sonic, Knuckles, and Tails—receive a mysterious invitation, promising a challenge they can’t resist. They head to a beach rendezvous, only to find Amy, Big, and Omochao there for a picnic. When they explain their purpose, Amy notes that Team Rose wasn’t invited. Soon, a shady figure, a Tanuki named Dodon Pa, appears, touting his “most advanced racing vehicles” and proposing a Grand Prix. While he’s vague about his motives, he emphasizes that teamwork is key to winning. Amy can’t shake the suspicion that he sounds too much like Eggman, and even Knuckles distrusts him. But Sonic’s excitement for the race wins out, and they agree to join, with Team Rose tagging along for the ride to Planet Wisp, where the first race awaits. At Planet Wisp, Dodon Pa reveals that the Grand Prix winner will get to keep their super cars, which raises red flags for Tails. After the first race, Dodon Pa’s callous disregard for safety raises even more suspicions. Amy and Tails start to feel that Dodon Pa is somehow connected to Eggman, and even Sonic begins to sense something is off, though he remains more intrigued by the competition. As they continue racing, Tails covertly contacts an unknown source to gather information on Dodon Pa. Though Big remains oddly unconcerned, Tails and the others start piecing together that Dodon Pa’s tech is more advanced than anything they’ve ever seen. When pressed for answers, Dodon Pa dodges the questions, leaving them with more doubts. As the Grand Prix heats up, Silver and Blaze arrive, having received similar invitations, and they team up with Vector, who claims he’s freelancing. While Blaze initially refuses to trust Dodon Pa, Vector persuades her to join under the guise of helping him out of trouble. They join the other teams in discussing Dodon Pa’s suspicious behavior and learn from Silver that Dodon Pa possesses technology with powers that surpass even their wildest imaginations. With Eggman soon making his appearance, Sonic and his friends begin to suspect that the stakes are much higher than just a racing tournament. During a break between races, Knuckles confronts Tails, who has been secretly conversing with Vector. They’re evasive, but Knuckles remains suspicious. Sonic later assures Knuckles that Tails will reveal his findings when the time is right. The arrival of Team Dark and Team Eggman heightens tensions further. Eggman denies any foul play, claiming he’s just there to race, but Shadow hints at something more sinister at work. When Sonic challenges Shadow to a race, Silver spots Eggman talking to Dodon Pa about an “Ultimate Energy Engine,” fueling their suspicions that Eggman has ulterior motives tied to Dodon Pa. As the races continue, Blaze presses Silver on his distant behavior, prompting him to admit a looming sense of dread. Meanwhile, Eggman plots with his hidden operative, and Team Rose detects strange signals coming from Dodon Pa’s equipment. Everyone except Big now suspects that Dodon Pa is feeding secrets to Eggman. Big, however, defends Dodon Pa, reasoning that the Wisps wouldn’t help a bad guy. Amy reluctantly admits that Big might have a point. After enduring race after race, Sonic and Amy grow confident that Eggman poses no real threat, though Eggman continues adding members to his team. The appearance of Zavok, however, complicates things. Although Eggman feigns ignorance, Zavok’s presence hints at a more dangerous plot. As Sonic and his friends debate their next steps, Knuckles loses patience and demands answers from Dodon Pa. Finally, Vector’s investigation uncovers the truth: Dodon Pa is not just any Tanuki, but the president of Donpa Motors and ruler of Donpa Kingdom, with a grand ambition to create the Ultimate Energy Engine. With the teams’ suspicions addressed, Dodon Pa explains that he has been gathering data from their teamwork to perfect his invention. His goal, he claims, is to harness the energy of teamwork to revolutionize transportation while minimizing pollution. With Dodon Pa seemingly cleared, the teams set their sights on Eggman, who is now intent on stealing the Ultimate Energy Engine for himself. Just as tensions begin to settle, Dodon Pa is kidnapped by Zavok under Eggman’s orders, and they retreat to the Final Fortress. The heroes give chase, but Eggman insists they continue racing to complete the engine’s power-up. Reluctantly, the teams engage in race after race, finally gathering enough Ultimate Team Energy. Eggman seizes the completed engine and installs it into his Death Egg mech, aiming to crush Sonic once and for all. After an intense showdown, Sonic defeats the Final Fortress, causing Eggman’s ship to spiral out of control. Sonic, along with Tails and Knuckles, rescues Dodon Pa as the Final Fortress crashes. In gratitude, Dodon Pa gifts each racer a new car to replace the ones lost in the fortress crash. With the Grand Prix back on, Sonic and his friends look forward to the thrill of racing once again, albeit with a renewed sense of caution and respect for the dangers they’ve faced. The Starfall Islands Incident (Sonic Frontiers): Dr. Eggman is uncovering a mysterious artifact on a desolate island. He uploads his AI into the device, hoping to unlock the secrets of the Ancients. But things take a sudden turn when the artifact activates a “protection protocol,” summoning strange robots and pulling Eggman into the digital realm. Some time later, Sonic, Tails, and Amy arrive on the Starfall Islands to investigate the disappearance of the Chaos Emeralds. As they approach, a wormhole tears open in the sky, pulling them into a digital world known as Cyber Space. Sonic finds himself alone in a twisted version of Green Hill Zone. Miraculously, he escapes and reawakens on Kronos Island, surrounded by ancient ruins and hostile robotic creatures. Here, he hears a strange, disembodied voice that claims he has done the “impossible” by escaping Cyber Space. Calling him “the Key,” the voice instructs him to collect the Chaos Emeralds, defeat Titans, and “tear down the walls between dimensions.” With no better options, Sonic embarks on a quest to rescue his friends and unlock the mysteries of the Starfall Islands. On Kronos Island, Sonic discovers that he needs to collect Portal Gears from Guardians to access portals back into Cyber Space. Completing challenges within these digital worlds rewards him with Vault Keys, which allow him to reclaim the Chaos Emeralds scattered across the islands. Early on, he finds Amy trapped in a container of cyber energy. Freeing her with Memory Tokens, he realizes she’s only partially freed from Cyber Space and now exists in a ghostly, digital form. Unbeknownst to him, a mysterious girl with a similar glitchy appearance watches from a distance. Later, Sonic encounters the girl face-to-face. She warns him to stay away from a massive robot, one of the Titans, and she tells him to leave immediately. But Sonic ignores her, but he is swiftly defeated. He realizes that only his super form will allow him to stand a chance against these colossal foes. Meanwhile, trapped in Cyber Space, Eggman commands the mysterious girl—now identified as Sage—to monitor Sonic. Sage runs simulations to find a way to free Eggman, but none succeed. As Sonic continues to explore the islands, he assists Amy in helping small, ancient creatures called Koco and gathers more Chaos Emeralds. Along the way, they experience visions of a long-lost civilization, hinting at a tragic past. Sonic then faces and defeats the Titan Giganto, unlocking a cryptic vision of a desperate Ancient and receiving instructions to head to “the sand-scarred island.” Upon arriving at Ares Island, Sonic rescues Knuckles, who’s also been pulled into Cyber Space. Together, they help Koco soldiers, further learning about the Ancients and their battles against unknown enemies. In his Super form, Sonic confronts and defeats the Titan Wyvern, experiencing yet another tragic vision of an Ancient. Moving on to Chaos Island, Sonic finds Tails trapped. Though he frees him, Sonic’s exertion causes him visible strain, which Sage ominously calls “cyber-corruption.” Despite his worsening condition, Sonic presses on, discovering remnants of advanced weapons and ruins. After another intense battle, Sonic defeats the Titan Knight and receives his final vision—a glimpse into the Ancients’ doomed war against an entity capable of destroying worlds. On Rhea Island, Sonic faces the truth behind his visions as he scales six cyber energy towers. The Ancients, fleeing from a planet-destroying force, crash-landed on earth and tried to seal away this entity, known as The End, in Cyber Space. But shutting down the towers fully corrupts Sonic, turning him into a digital shell as the towers release Eggman and everyone else from Cyber Space. With The End now free, Sonic’s friends sacrifice their physical forms to bring him back, and Sage convinces a reluctant Eggman to form an uneasy alliance with Sonic. Sonic heads to Ouranos Island for a final showdown. Sage suggests a risky plan: with Sonic's friends collecting the Chaos Emeralds, Sonic must complete trials to harness his cyber corruption as a new power. Reunited, they gather the Emeralds while Sonic confronts the spirits of fallen Titan pilots in a series of grueling tests. With the Emeralds in hand, Sonic transforms into Super Sonic and takes on the Titan Supreme, only to face the resurrected threat of The End. Despite its regenerative powers, Sonic taps into his newfound cyber abilities, detaching Supreme from The End. With Sage and his friends holding off The End’s attacks, Sonic delivers a decisive blow, vaporizing Supreme and ending The End once and for all. As Sonic and his friends prepare to leave, they reflect on their journey and what lies ahead. Tails vows to continue growing on his own, Amy muses about seeing Cream and Sticks, and Knuckles looks forward to returning to Angel Island. With their future plans set, they board the Tornado and leave the Starfall Islands behind, as Sage and Eggman, now closer than ever, watch the peaceful sky above. The Marauders Incident (Sonic Chronicles: The Dark Brotherhood): After Dr. Eggman is defeated and presumed dead following a final confrontation with Sonic, Knuckles, Amy, and Tails that ends in the destruction of his ship, the Egg Carrier, life quiets down. With no sign of Eggman and the world seemingly at peace, Sonic sets off on a solo adventure around the globe, while the others go their separate ways. However, Sonic's vacation is cut short when Tails calls him with urgent news: Knuckles has been kidnapped. Sonic heads to Central City with Amy to meet Tails, where Rouge the Bat escorts them to G.U.N. headquarters. There, the Commander reveals that G.U.N. and Team Chaotix have been monitoring a group known as the Marauders, and although they have located several of their hideouts, Knuckles remains missing. Tails has managed to repair broken communicators found at these sites, leading them to pinpoint the Marauders' main base in the Mystic Ruins. Using Tails’ Tornado plane to avoid the G.U.N. guards, they make their way to the Ruins. With the help of Big the Cat, they track down the Marauders' base and find Knuckles escaping from captivity. However, as they leave, they discover that Angel Island has vanished. Back at his workshop, Tails builds an Eggman Tracker to locate Eggman and determine his connection to the recent events. After finding scattered remnants of Eggman’s technology in various locations—including an encounter with Shadow—the team disables a force field in Green Hill Zone and finds Eggman inside. He claims to have survived his last encounter by anticipating his own defeat and arranging a robot rescue. Eggman reveals that Angel Island is being pulled towards Metropolis, where the Marauders' main base is hidden. Flying to Blue Ridge Zone to reach Metropolis, the team reunites with Shadow, who is searching for E-123 Omega. They are soon ambushed by Shade and the Marauders. Shade reveals herself as an echidna from the Nocturnus Clan, shocking Knuckles, who believed he was the last of his kind. After Sonic defeats her, Shade blocks their path to Metropolis. Eggman provides an alternate route through an underground railway, where he tells them of a weapon in his lab that could stop the Marauders, provided they can gather the necessary parts. The team splits into two: Sonic and Knuckles head to Angel Island to secure the Master Emerald, while Tails and Eggman prepare the weapon. Tails’ team develops a non-lethal device to return the Nocturnus to their dimension, while Sonic’s team infiltrates a Nocturnus airship headed for Angel Island. During the battle, Tails and Eggman accidentally damage the airship, but Sonic and Knuckles manage to reach the island. On Angel Island, they confront the Nocturnus leader, Grand Imperator Ix, who reveals his plan to conquer all dimensions. Shade is shocked, having believed Ix only wanted to bring the Nocturnus back to Earth after they were banished to the Twilight Cage. As Ix nearly overpowers the heroes, Tails and Eggman arrive using a teleporter from Metropolis. They activate the non-lethal weapon, transporting some of the Nocturnus back to the Twilight Cage. Ix escapes with the Master Emerald, causing Angel Island to crash into Metropolis. The team witnesses Ix opening a wormhole, taking the Nocturnus back to the Twilight Cage. Tails and Eggman devise a plan to follow Ix into the alternate dimension using a specially built vehicle, the Cyclone. However, the island's impact has knocked out Metropolis’ power, so Sonic and Shade restore it and retrieve a Dimensional Buffer to stabilize the Cyclone. The team sets off, leaving Eggman behind to monitor their return. Upon entering the Twilight Cage, they crash-land on a rocky planet, the Kron Colony. Tails suggests powering the Cyclone with a Chaos Emerald, which they find on the colony. The Kron, giant rock beings enslaved by Ix to manufacture weapons, initially mistake the team for Nocturnus spies. After Sonic frees the Kron, they lend him the Emerald and offer their alliance. Next, the team travels to the N'rrgal colony, where the slug-like N'rrgal drain the Cyclone’s power and ask for the team’s help against the Zoah. The team retrieves the Chaos Emerald that Ix gave to the Zoah, securing their support. The journey continues to the Voxai Colonies, where Sonic frees the peace-loving Voxai from the mind-controlling Overmind, who serve Ix with the help of two Chaos Emeralds. With the help of the allies they’ve gathered, the team mounts an assault on the Nocturnus homeworld of Nocturne. After penetrating its defenses, Sonic and Knuckles split up to confront Prefect Charyb and Prefect Scylla, two Gizoids empowered by Chaos Emeralds. Following their victories, the teams regroup to challenge Ix. As Sonic and Knuckles arrive, they find Ix using the Master Emerald to achieve a super transformation. Sonic transforms into Super Sonic with the Chaos Emeralds and defeats Ix. As Nocturne collapses, the team escapes to Metropolis in the Cyclone, only to find Eggman waiting with a fully restored empire. Having spent years in the Twilight Cage due to its slower time, Eggman has used the time to rebuild. The adventure ends with Sonic, Tails, and Omega preparing to take on the new Eggman Empire, ready for their next challenge.