Sonic the Hedgehog (Post-SGW)

Early Adventures
Not much is known about the Speedy Hero's early life, but when Dr. Ivo Robotnik began his attempts at world domination as Dr. Eggman, he would quickly make his presence known to the omelet dictator, constantly thwarting his plans at every turn. When Dr. Eggman and Dr. Julian Snively began their strip-mining and processing of South Island as well as major construction and refinements on Westside Island, Sonic made his first appearance to the two doctors and followed them all the way to their base on the island, the Scrap Brain Zone, battling the duo within the Final Zone.

The two doctors fled to Westside Island where they continued with their original plans, and Sonic would chase them down; however, his victory over the villains inspired the creation of the Freedom Fighters, who resided in Westside Island's Knothole, a hideaway from Dr. Eggman, who conquered their original home, Mobotropolis. With new friends in tow, Sonic and the Freedom Fighters chased down the two doctors, with Miles "Tails" Prower close to Sonic's side as his sidekick and best buddy. Eventually, Sonic would reach the original version of Eggman's flying fortress, the Death Egg, where he battled a Silver Sonic model and Eggman in his Egg Destroyer Battlesuit. Ultimately, Sonic put a stop to the doctors' plans and defeated them.

After these early victories, peace returned to South Island and Westside Island, until Sonic's friend, Tails, was kidnapped by Dr. Eggman. In the Underground Zone, Sonic fought against Coconuts of the Super Special Sonic Search & Smash Squad (also known as S6 Squad) and the first generation super-Badnik, Egg Antlion. After defeating them, Sonic came across the other two members of the S6 Squad, Scratch and Grounder, who pretended to use their double agent, Breezie as a hostage, but Sonic managed to take out both Scratch and Grounder before they could finish their sentence about harming Breezie. Sonic took Breezie along with him afterwards, who winded up betraying him, with Breezie revealing her betrayal to Sonic when they reached the Scrambled Egg Zone. It was here where the prototype version of Silver Sonic made its appearance and battled Sonic, but was eventually defeated. Sonic eventually faced off against Dr. Eggman in the Egg Storm Chamber, where Eggman held Tails captive. However, the Naugus twins, Walter and Wendy, arrived nearby seeking revenge on both Eggman and Sonic. Eggman let Tails go free in an attempt to keep Sonic from chasing after him while Eggman fled before the twins could find him. However, he was intercepted and trapped in crystal by the twins before he could escape, and Sonic caught up with him moments later, only to be trapped in crystal himself by Wendy. Tails, watching from afar, sadly promised to rescue Sonic as the twins walked off with their captives. In the end, the twins were defeated, and both Sonic and Eggman were set free. Sonic however became reluctant to share the tale of Breezie's betrayal even with his closest friends, though Sally was apparently familiar with her.

When Dr. Eggman conquered Little Planet after it appeared over Never Lake, Sonic went on a new adventure to stop him and save the small planet. On Little Planet there existed special stones known as the Time Stones, which were powerful gems capable of controlling the passage of time. Eggman had his eye on these stones all along, ever since the planet appeared on the last month of the year, and so he successfully chained Little Planet down on a mountain with his face carved into the mountain and set about converting the world into a giant fortress. Sonic arrived on the scene to stop Eggman from taking all the Time Stones that would allow him to manipulate time and conquer the world. It was during this adventure that Sonic met Amy Rose, who had a massive crush on Sonic. Soon after meeting, Metal Sonic swooped in and kidnapped her. Sonic eventually caught up to Metal Sonic, and the two raced against each other in Stardust Speedway Zone, with Dr. Eggman flying closely behind to attack whoever was too slow. After Sonic outraced his metallic doppelganger, Metal Sonic got struck by Dr. Eggman's laser, leaving him out of the picture for the time being as Sonic was able to rescue Amy. Eventually, Sonic successfully prevented Dr. Eggman from obtaining any Time Stones and defeated the evil doctor.

Eggman would not stay down easily, and eventually set out to relaunch the Death Egg from where it had crash-landed on Angel Island. He would be joined in this endeavor by Knuckles the Echidna, Guardian of the island and its source of flight, the Master Emerald. Knuckles was convinced that Sonic and Tails were trying to steal the Emerald, and he attacked Sonic and stole the Chaos Emeralds from him after the pair arrived on the island. The pair would go on to engage Eggman's forces and Knuckles in battle on several occasions, though Knuckles would eventually learn Eggman's true nature and the first Death Egg would be brought down for good.

While running through Green Seaside Zone in the Eastwatch Islands, Sonic came across Tails being attacked by a Super-Badnik. After saving him, Tails informed him of a rumor that Eggman was searching the islands for the Ancient Gears in order to run his new super-weapon, the Mega Drive. After encountering Eggman, the two defeated him and retrieved one of the Ancient Gears that Eggman had found as well as saved captured animals. On the next island, Flower Park Zone, Sonic and Tails came across Amy Rose, who was following Sonic in an attempt to travel with him. Initially refusing to have Amy tag along with them, Sonic changed his mind when Amy proved she was not longer helpless by showing she could grab any rings Sonic dropped as well as her new Piko Hammer. After once again encountering Eggman, the trio defeated him and retrieved another Ancient Gear as well as saved more captured animals. In the Cascade Temple Zone, the trio fell into a trap run by Knuckles, who had once again been tricked by Eggman, this time into believing Sonic had been going on a rampage as Super Sonic with the Chaos Emeralds. After realizing his mistake, the four teamed up and once again encountered and defeated Eggman, retrieved another Ancient Gear, and saved captured animals. (SMD)

After arriving at Glitter Park Zone and defeating another badnik, the four heroes once again encountered Eggman, who was easily defeated thanks to Tails' strategy and the power of Tail, Amy, and Knuckles, with Sonic watching on in disappointment, realizing that he wanted to adventure by himself and at his own pace. After retrieving another Ancient Gear, the team traveled to Haunted Depths Zone, where Sonic suggested splitting up to cover more ground. At first Sonic was happy by himself, but after encountering and defeating Eggman once more and retrieving another Ancient Gear, he realized that he had no one around to joke around with at Eggman's expense. Sonic then arrived at Eruption Ruin Zone, where he found himself stuck, as he could not reach the ledge that he needed to in order to continue. After worrying about his three friends, the traveling trio showed up and helped Sonic reach the ledge. Sonic decided he would wait for his friends to reach the ledge as well, realizing that he preferred having his friends around with him after all. After teaming up to defeat Eggman once again, the team retrieved one more Ancient Gear, but their victory was cut short by Metal Sonic, who swooped in to steal the five Ancient Gears that Tails had as well as kidnap Amy. After Tails realized where Eggman and Metal Sonic could be hiding, Sonic, Knuckles, and Tails made their way to Eggman's new flying fortress. After handing over their Ancient Gear in exchange for Amy thinking that Eggman didn't have the seventh (since Eggman specifically asked for the "last" Ancient Gear from Sonic after stealing the five from Tails), the team realized that Metal Sonic had the last Ancient Gear inside of it. After the three defeated Metal Sonic and saved Amy, Eggman and Metal Sonic fled the fortress. After taking a look at the database on the fortress, Tails realized that there was a deep sea base directly under where they were and that the airship was only for supply shipments, Sonic decided that before pursuing the villains they should collect the seven Chaos Emeralds, which had a habit of showing up when they needed them.

At some point in the past, Lupe the Wolf's village was invaded by Dr. Eggman's forces. Thankfully, Sonic the Hedgehog, Sally Acorn and Antoine D'Coolette came to her aid. Sonic ran off to follow and defeat Dr. Eggman while Antoine defended Sally and Lupe. Using the terrain of the Thunder Plains Zone to his advantage, Sonic lead the evil dictator into a lightning bolt, destroying the doctor's vehicle and sending him fleeing, resulting in an exchange of dialogue where Dr. Eggman expressed his hatred for his blue foe and Sonic made a mockery of his nemesis's name.

Sonic's battles with the mad doctor would continue, and he later went up against Eggman and the revived Metal Sonic who the doctor rescued from Little Planet. Sonic defeated the two in the doctor's revived Death Egg, the Death Egg Mk II, which was built around the small planet.

When the doctor hatched a plan involving his airship, the Egg Carrier, and the water-based Demi-God Chaos, Sonic had to team up with his friends in order to put a stop to the omelet dictator once more. While returning home through Station Square after being gone for a while on a long journey, Sonic encountered Chaos for the first time. Sonic defeated Chaos, but it escaped. The next day, Sonic saw Tails crash in his plane nearby and came to his aid. The fox took Sonic to see a plane he was working on, powered by a Chaos Emerald, but at the workshop Dr. Eggman appeared to take the Emerald. Though the duo beat Eggman, Eggman snatched the Chaos Emerald and revealed Chaos, whom he transformed into Chaos 1 with the Emerald and told his plan to make it invincible with all seven Chaos Emeralds and build Robotnikland upon Station Square. As Eggman fled, Sonic set out with Tails to get the Chaos Emeralds before Dr. Eggman. Sonic and Tails soon got two Emeralds, only for Eggman to briefly knock them out with sleeping gas and steal one. Unshaken, Sonic and Tails soon found another Chaos Emerald, but were attacked by Knuckles, who had been tricked by Eggman into believing that Sonic had at least one Emerald Shard. Sonic fought Knuckles until he dropped the Chaos Emeralds, which were then taken by Eggman and given to Chaos 2, transforming it into Chaos 4. After Sonic and the others beat it, Eggman escaped to his Egg Carrier. Sonic and Tails tried following him in the Tornado, but were shot down.

Back on the ground, Sonic began looking for Tails, but met Amy who wanted him to protect a Flicky. Despite Sonic refusing, Amy followed him until they were attacked by ZERO, who soon kidnapped Amy. Sonic followed them as ZERO fled to the Egg Carrier until he reached a dead end, but then met Tails in the Tornado 2 who got them aboard the Egg Carrier. When they found Amy with Eggman however, Sonic was attacked by E-102 Gamma, but before Sonic could destroy Gamma, Amy convinced him to let the robot go. As the Egg Carrier began to crash, Sonic had Tails got Amy to safety while he followed Eggman. Eventually, Sonic found Eggman with Chaos 6 just as Big the Cat showed up to save his friend Froggy, who was trapped inside Chaos. After saving Froggy, Sonic defeated Chaos 6, but as Eggman escaped, Knuckles showed up, whom Sonic left Chaos to while he followed Eggman. On the way, Sonic found an ancient temple with a mural depicting a monster on the inside and a mysterious light which took him back in time to see the Altar of the Emeralds in ruins and Tikal trying to stop a catastrophe. Back in the present, Sonic found Eggman and beat him for good before reuniting with Tails again.While trying to rest, Sonic had to head out when Tails reported that Angel Island had fallen. There, they found both Knuckles and Eggman, and learned that Chaos was still alive, had rebelled against Eggman to destroy the world, and possessed six Chaos Emeralds. As they were heading out to get the last Emerald before Chaos, Sonic was drawn into the past again, where he saw the Knuckles Clan's attack on the altar and Tikal sealing herself and Chaos inside the Master Emerald. Back in the present, Sonic and Tails found the Chaos Emerald in the Tornado 2, but lost it to Chaos, who became Perfect Chaos and attacked Station Square. As Perfect Chaos destroyed the Egg Carrier 2, Tikal came to Sonic to explain that Chaos was blinded by wrath. After Perfect Chaos released the drained Chaos Emeralds, Tikal wanted to seal Chaos again, but Sonic said it would not work as Chaos would still be full of rage. Sonic's friends then came with the Chaos Emeralds, claiming that he could still use their positive energy. Transforming into Super Sonic, Sonic defeated Perfect Chaos while neutralizing its anger. As Chaos and Tikal departed, Sonic noticed Eggman making his escape and decided to head off himself for his next adventure.

Another adventure would see Sonic gain a new rival in the form of Shadow the Hedgehog. Sonic had to prove his innocence since Shadow was mistaken for him, and eventually Sonic and his friends made their way to Space Colony ARK, where Sonic and Shadow teamed up to stop the Biolizard.

Sonic would later cross paths with Shadow again when Tails, Knuckles, and he joined forces to form Team Sonic. This group would battle Shadow's Team Dark and then join forces with them, Team Chaotix, and Team Rose to battle Neo Metal Sonic and his transformed state, Metal Overlord.

When a gaping hole opened up in the sky and the Black Arms descended from the clouds causing pandemonium in the city below, Sonic worked with most of his friends and G.U.N.'s forces to repel their invasion of the planet. Eventually, Sonic and his friends once again met up with Shadow (they met up with him during this crisis) on the Black Comet. Shadow, who had gathered all of the Chaos Emeralds, was speaking with Black Doom, the leader of the Black Arms who commanded Shadow to give up the Emeralds so that they could begin the 'Ritual Of Prosperity'. Sonic and the others, including Dr. Eggman, told Shadow not to listen to the alien leader. It was then revealed that Black Doom wished to harvest humans as an energy source. After taking the Emeralds from Shadow and using Chaos Control to warp the Black Comet down to the surface of the planet, Black Doom explained that he helped Professor Gerald create Shadow but only in return for the Chaos Emeralds, which were needed to bring the comet down to the surface, revealing that Shadow was actually created using Black Doom's DNA. As Eggman was in disbelief that his grandfather would betray the planet, Black Doom paralyzed everyone with a special gas and left them to be devoured by his alien offspring. As the end seemed near, Shadow suddenly heard Maria asking for help and he broke through the paralysis. Black Doom fled, leaving behind Shadow, the only hope for the planet. Eventually, Shadow used the Chaos Emeralds to become Super Shadow and fought Black Doom, who had transformed into Devil Doom, and in his super state used a super-powered Chaos Control to warp the Black Comet back into the planet's orbit and tear it apart with a blast from the Eclipse Cannon, saving the world and stopping the invasion.

Sonic would continue to make new friends on his adventures, such as the powerful robot Emerl, who was later destroyed and rebuilt into Gemerl by Eggman. He would also befriend Cream the Rabbit and Cheese the Chao while helping them save Cream's mother Vanilla, before helping fight off the invasion of the evil Black Arms. Future adventures saw him team up with the otherworldly princess Blaze the Cat to battle Dr. Eggman Nega, and later meet Marine the Raccoon and help her and Blaze battle Nega's Sol Zone Pirates led by Captain Whisker. He would then be caught up in Eggman's schemes to harness the power of a monstrous creature in an aborted timeline that saw him meet Silver the Hedgehog while battling the evil of Solaris.

Sonic Generations
At one point Sonic had to team up with a younger version of himself to battle two versions of Eggman and the evil Time Eater. The pair succeeded, but as a result they made it possible for Eggman to form an alliance with the evil Dr. Albert W. Wily from another world.

A little while later, Sonic returned to Mobotropolis with Tails to find the city under attack by the transformed Tails Doll. The pair were about to combat the monster, when suddenly the world was enveloped by a second Genesis Wave...

Fighting for Two Worlds
Sonic once again found himself running through the Green Hill Zone when he felt a sudden sense of deja vu, similar to what he had felt there previously. He shook off this feeling and focused on the task at hand: finding his missing friends. Earlier on, he'd gone to Tails' workshop where the young fox should've been getting ready to set off on a journey through the Mystic Ruins with him, only to find that his best buddy was nowhere to be seen, his bag of supplies spilled out across the floor. Worried about his friend, Sonic then flew the Tornado to Angel Island to get Knuckles to help him search for the young fox, but instead was surprised to find that the Guardian of the Master Emerald was not at his post. Finally, Sonic headed over to Amy's house, with the intention of asking for her help (noting that she'd be good at finding them as she seems always able to track Sonic down easily), but sure enough, the pink hedgehog had also vanished. Realizing that something bad had happened, he approached the Chaotix for help, asking them to join the search.

Sonic was briefly joined in his search by Silver the Hedgehog, who informs him that he felt a disturbance in space-time that he had traced back to this point. Sonic questions whether Silver had, like him, acted upon a gut feeling that something was wrong, much to Silver's surprise. The two hedgehogs both come to the conclusion that Doctor Eggman is most likely the cause of whatever is wrong, moments before Silver is shot down by a mysterious blue-armored boy wearing a purple scarf in front of Sonic's very eyes. Sonic gave chase after the mystery assailant, remarking that he should've shot him while he had the chance. After a long chase, the armored boy quickly ducked out of sight at the very moment Mega Man was approaching their location, himself chasing Metal Sonic. Mistaking the identical Mega Man with the boy he'd been chasing, Sonic strikes the boy-robot with a spindash as Metal Sonic and the boy disappear from sight. After cheering that he'd knocked the scarf right off of him, Mega Man, in turn mistaking Sonic for the strange blue blur he'd been chasing, proceeded to shoot at Sonic with his Mega Buster Cannon, sparking a fierce brawl between the two. The two heroes continued to tussle as Tails Man observed from nearby, transmitting footage of the battle to a celebrating Doctor Eggman and Dr. Wily aboard the Wily Egg.

As their fight continued, Sonic bragged about having taken down hundreds of robots in the past; when the fight appeared to be a stalemate, Sonic decided to use the surroundings to his advantage, running through Green Hill Zone's loops to boost into Mega Man and then bounce around him in the springs before knocking him off his feet, only to be punched back by the Blue Bomber. Suddenly, a Warp Ring portal appeared behind the heroic robot, created by Mega Man's father, Dr. Light; this distracted Mega Man long enough for Sonic to disable his Mega Buster. Mega Man then tricked Sonic into following him through the portal and they (along with Tails Man) arrived back in Mega City. Sonic wondered if he'd arrived in Station Square or Westopolis, though quickly guessed that such wasn't the case, as Mega Man called his friends Tango, Eddie, Beat and Rush to his aid.

The two heroes continued their fight, Mega Man repairing his Buster and taking to the air against Sonic with Beat and Rush's aid. Tango's use of a spin dash-esque attack only riled Sonic further. However, as the battle began to endanger civilians, Mega Man again attempted to reason with Sonic, only to be confused as Sonic accused him for Copybot's crimes. As they argued, Tails Man attacked them on Eggman's and Wily's orders. This forced them to put aside their feud to protect nearby civilians and engage the Roboticized Master. Unexpectedly, their combined attacks-Sonic Spin-Dash and Mega Man's charged shot-immobilized the Robian, and Mega Man's weapon copying powers restored Tails to normal. Comparing notes, the two heroes quickly realized the truth: that their respective nemeses Eggman and Dr. Wily had joined forces, and that each had been framed-Sonic by Metal Sonic and Mega Man by Copybot. With that issue settled, Sonic suggested they meet with Mega Man's creator, Dr. Light, and they teleported to Light Labs. Unfortunately, they arrived just in time to see the doctor being kidnapped by Metal Sonic and his new partner, Bass. Quickly resolving that they had to save the doctor and Sonic's other missing friends, the pair and Tails teamed up with Mega Man, Rush, and Mega Man's "brother" Proto Man. With Tails' genius at work, they managed to create a portal that allowed them to enter the doctors' Skull Egg Zone.

Making their way deeper into the strange zone, which combined elements from both their worlds, the heroes soon ran into opposition: Copybot, backed by the Genesis Unit. The group's name struck a chord in Sonic, but he had little time to think on it as the trio of Robot Masters attacked. The heroes split up, with Sonic taking on the monkey-like Buster Rod G, who brought back vague memories of fighting Monkey Khan. Sonic was quick to insult the robot, thinking they should rename him Kiki after the Badnik. The fight was quickly ended thanks to Mega Man's new weapon-acquired from Tails Man-and the group's team effort. Mega Man and Proto Man then noted the strangeness of the Copybot and Genesis Unit returning, as intelligent robots from their world were incredibly complex and nearly impossible to rebuild. Moving on, the heroes encountered further strange activity, as well as a new threat: a team of eight Roboticized Masters. After a brief battle, Proto Man left and drew most of the group off, leaving Sonic and the others to deal with Vector Man, Espio Man, and Charmy Man. Remembering their defeat of Tails Man, the remaining heroes resolved upon a strategy: Tails would modify the Mega Buster to emulate Sonic's Spin-Dash, and Sonic would run interference. The tactic worked, and the three detectives were soon restored to normal, with their Master weapons added to Mega Man's arsenal.

Sonic's group continued their journey, but soon ran into another obstacle: the Roboticized Shadow, known as Shadow Man, and his Robot Master ninja partner, also known as Shadow Man. After some confusion caused by the shared name, the heroes engaged the two villains, and managed to restore Shadow to normal only to have him destroy Shadow Man, who had been frozen by the weapon Mega Man had acquired from Shadow. When offered a chance to join their quest or help find Proto Man, Shadow declined both and disappeared using Chaos Control. The warping of space-time rekindled lost memories for the heroes, making Sonic remember that Eggman had altered reality before, and making him dread the possible effects of a second Genesis Wave. Determined to undo the damage that had been done, the heroes pressed on only to meet Silver Man and Blaze Woman. Sonic and Tails engaged the fire-wielding robot, but fortunately were quickly relieved by a restored Silver and Mega Man. With his two friends deciding to rest and regain their strength for the coming battle, Sonic and the others continued forward to find the remaining Masters. Soon afterwards, they met the pair-Rose Woman and Knuckles Man-who had been ordered to destroy them at all costs, including self-destruction. Fortunately, they were able to return the two to normal, and after ribbing Knuckles and being tackle-hugged by Amy, Sonic laid out their game plan. Tails and Knuckles left to join Proto Man and the Chaotix, Mega Man and Rush departed to collect Silver and Blaze, and Sonic and Amy took off to find Shadow.

With their allies assembled-and joined by Shadow's fellow Team Dark member E-123 Omega-the heroes massed at the Wily Egg, where they were confronted by a massive army of Robot Masters, much to Sonic's delight. Sonic threw himself into the battle, taking on enemies like Mega Water S and Plant Man while encouraging an anxious Mega Man about their efforts to rescue his father. He continued to provide assistance to his allies, downing enemies like Yamato Man, Knight Man, and Hard Man-the latter to Shadow's annoyance. He was soon targeted by a squadron of high speed Robot Masters-Slash Man, Charge Man, Metal Man, Turbo Man, and Nitro Man-but found his most entertaining opponent in Quick Man. After tripping up the Robot Master, Sonic helped Mega Man restore Rouge Woman-the newest Roboticized Master-to normal before going on a spree across the battlefield. Outrunning Quick Man at every turn, he encountered the likes of Ring Man, Tomahawk Man, Strike Man, Search Man, Junk Man, Ground Man, Jewel Man, Wave Man, and the recreated Buster Rod G before taking down his pursuer for good. At Shadow and Proto Man's suggestion, however, Sonic broke off from the fight with Tails, Mega Man, and Rush to board the Wily Egg. Just as they were heading to board the flying fortress, however, they spotted Dr. Light plummeting towards certain death from its underside.

Shadow was able to use Chaos Control to save Dr. Light and teleported him onto the battlefield to help the others. Tails was able to hack into the systems and teleported them into the Wily Egg. Once inside, Sonic and Mega Man bantered about the Wily Egg's interior defenses, which were inspired by features from both Death Egg and a typical Wily Castle. At that moment, they ran into the Mega Man Killers. As the two sides engaged, one Mega Man Killer, Punk, used a spin dash-like move to combat Sonic, much to the hedgehog's annoyance. Eventually, Sonic tricked Punk into crashing into his own teammate, Enker. He and Tails then attacked Ballade, but while Sonic managed to land a hit, Tails was hit at point-blank range by one of Ballade's bombs. With Tails too badly hurt to go on, Sonic and Mega Man had Rush carry him out of the Wily Egg. The blue heroes continued further into the Wily Egg, with Mega Man trying to assure Sonic that Tails would be alright. They soon ran into further resistance in the form of the Chaos Devil, which quickly overwhelmed them. Luckily, Duo arrived and saved them. With Duo keeping the Chaos Devil busy, the blue heroes made the last leg of their trek through the Wily Egg, stopping at a Wily/Eggman-themed boss door. On the other side of said door, the power seemed to go out, making Sonic wonder if they had already won. Just then, however, he and Mega Man were ambushed by Bass, Metal Sonic, and Treble.

Sonic immediately engaged Metal Sonic while Mega Man fought Bass and Treble, Sonic taunting his robotic counterpart with his knowledge of all the defeats the robot had suffered at his hands. Reaching a stalemate with their dark rivals, the blue heroes, realizing they were only being stalled to buy the doctors time, decided to try the old "mix-and-match" strategy of switching opponents. However, this plan almost immediately backfired; Metal Sonic disoriented Mega Man with his speed, while Bass fired too rapidly for Sonic to get in the mid-battle banter he favored. After barely dodging an attack from Treble, Sonic caught a brutal roundhouse kick in the abdomen from Bass. The two then decided to gang up on their rivals one at a time, with Mega Man using all of the abilities he gained from the Roboticized Masters while Sonic helped him along the way. Bass was the first to go down, followed by Treble, and then Metal Sonic.

Soon after this, Eggman and Wily burst into the room in their powerful new battle mech, the Egg-Wily Machine-X. Fatigued from the fight with their rivals, Sonic and Mega Man were quickly beaten and knocked unconscious. They later awakened to find themselves imprisoned in containment pods within the heart of the Wily Egg, face-to-face with the evil doctors and the gathered Chaos Emeralds. It was then that Eggman and Wily horrified the blue heroes with the truth of their master plan: to unleash a "Super Genesis Wave" to not only completely remake their universes in their image, but also erase their enemies from existence. As Mega Man tried to reason with Wily, Sonic, struggling to free himself from his prison, inquired to Eggman if he was worried about reality breaking due to his and Wily's tampering with Space-Time. When the doctors expressed little concern about it, Mega Man was disgusted, although Sonic wasn't too surprised.

At this point, all seemed hopeless. The Super Genesis Wave was ready to go, Sonic and Mega Man were trapped with no chance of escape, the Chaos Devil was keeping Duo occupied, and Sonic's friends, along with Dr. Light, Proto Man, and Rush, were rapidly losing ground against the Robot Master army. A turning point came, however, with the arrival of the eight original Light Labs Robot Masters, whom Roll had called in to help. With the Light Masters now on the battlefield, Knuckles, Proto Man, Dr. Light, and Rush took the opportunity to break into the Wily Egg. There, the red heroes attacked Eggman and Wily while Dr. Light freed Sonic and Mega Man. At Light's suggestion, Mega Man fused with Rush to don Super Adaptor Armor. Inspired by the word "super" Sonic had Mega Man hoist both of them up to the Genesis Reactor, where the Chaos Emeralds were. Then, as the Super Genesis Wave activated, the blue heroes absorbed the Emeralds' power to become Super Sonic and Super Mega Man. After preventing the evil doctors from killing Knuckles and Proto Man, Mega Man and Sonic instructed them to evacuate Dr. Light and have Duo fall back. A huge battle ensued between the two sides, ending with Sonic and Mega Man emerging victorious. By then, the Super Genesis Wave was already starting to reshape all reality, so Sonic taught Mega Man how to use Chaos Control to restore their worlds to normal. However, Eggman, unwilling to accept defeat, attacked Sonic while his Chaos Control was still charging. After getting Mega Man to restore Earth 20XX, Sonic turned his attention to restoring his own world, which proved to be easier said than done as he struggled to focus Chaos Control under Eggman's assault. Realizing it was all or nothing now, Sonic used Chaos Control. Due to Eggman's interference, however, it was clear something awful was now about to happen to their world. As Sonic wondered what Eggman had done, white light consumed them both...

Countdown to Chaos
From a reader's point of view, everything from here on picks up from where the original timeline ended. Sonic returned after the Super Genesis Wave, but suddenly had a completely different set of memories: including the recollection that they had just been attempting to rescue Mecha Sally at the Northern Tundra with Silver and Team Fighters, seconds before being pulled into his adventure with the Blue Bomber. Noting the absence of both Amy and Silver, he was looked over by a concerned Tails, who reminded him that they were there to rescue King Acorn. Sonic quickly guessed at Walter Naugus' involvement, and the depowered sorcerer himself fled the city, completely ignoring his enemies. During the course of the battle with Tails Doll, Tails' memories of the same alternate reality returned, and the two swiftly acted to defeat the monster. As they headed for Castle Acorn, Sonic's real memories began to return to him, confusing him a bit as they conflicted with his "new" ones. Upon freeing their monarch, the pair were surprised to find that he was healthy and cheerful, compared to the elderly and disheveled King they had seen in their other set of memories. After discussing the matter with NICOLE, Sonic and Tails determined that their best course would be to locate the other Freedom Fighters.

Sonic and Tails soon found themselves in the area of the Mystic Ruins, searching for Rotor and finding Big the Cat instead. Fortunately, Big knew where their missing friend was located, and led them to the general area, which Sonic recognized as the Final Egg. Realizing that he recognized the area, that never existed in his other set of memories, the hedgehog noted that it was becoming harder to distinguish between the two. The heroes' pondering was put on hold as they realized that the Sky Patrol, Rotor's location and the Freedom Fighters' new base, was under attack by Spinner Badniks. Sonic and his two companions engaged the enemy alongside Rotor, defeating the lesser robots and a new Silver Sonic who appeared to join them. Afterwards, Sonic and Tails reunited with Rotor, both of them noting with surprise the Walrus' vitality given his injuries and girth in their other set of memories. Knowing that it was the only real way to help their friend realize what had taken place, Sonic and Tails handed him NICOLE, granting Rotor his own memories of the other reality. Rotor reacted poorly, but managed to inform the pair that Sally and Bunnie were on deep cover missions, Antoine was with Uncle Chuck in Knothole, and Amy had disappeared mysteriously.

Making their way to Knothole in the Wood Zone, Sonic and Tails found Antoine and Chuck, whom they were both happy to see given the condition the swordsman was in according to their other set of memories. They were also stunned to encounter Ben Muttski, whom the two were still remembering as being Sonic's faithful Mobini canine companion. At Tails' urging, they refrained from granting Chuck his memories of the other world, choosing instead to restore Antoine's. After telling him what little they could of Bunnie's whereabouts, the pair were suddenly shaken-quite literally-as a powerful tremor rocked the area. A massive fissure appeared, and both Chuck and Muttski fell in. The Freedom Fighters managed to save them, but in the process, Sonic inhaled a mysterious, purple gas that the pair had extracted from below the surface for study. After displaying a brief, feral reaction, Sonic claimed to be fine, refuting Chuck's insistence that he see a doctor. Antoine reluctantly decided to escort the scientists to Spagonia, entrusting Sonic and Tails with the task of finding Bunnie.

The pair made their way to the Metropolis Zone, where they found Bunnie disguised as a member of the Egg Army. After being reminded that she's still partially roboticized, they decided to wait until they could reunite with the others before giving her her alternate memories. Working together, they helped her complete her mission: acquiring a shield generator for the Sky Patrol from Eggman's newest Death Egg project. Returning to the Sky Patrol, they found Antoine waiting, and after restoring Bunnie's memories left the distraught Rabbot to be comforted by her husband. Still concerned over Amy's absence, Sonic decided to focus on locating Sally next. The heroes also had to deal with another dilemma: NICOLE's diminishing reserves of Genesis Wave energy meant that she might only be able to restore one more set of memories.

A return trip to Mobotropolis found Sonic arriving just in time to save Sally, Amy, Cream, and the Royal Palace Guard from the attacking Metal Sonic. After working with Tails to deal with his metal doppelganger, Sonic happily reunited with his friends, though his comments about the alternate timeline and the Genesis Wave left the pair confused. Following a brief reunion with her father, Sonic took Sally and the girls back to the Sky Patrol, where they prepared to restore Sally and Amy's memories. Like the other Freedom Fighters before them, the two-particularly Sally-were deeply shaken by their newly regained memories. Unfortunately, they would have little time to mull the experience over, as NICOLE finally computed the horrific consequences of the Super Genesis Wave's improper reversal. Not only had the entire multiverse imploded, but the damage caused the entire planet to break into large fragments.

Return Of The Freedom Fighters
The Freedom Fighters quickly traveled to Station Square in order to provide relief to victims of the Shattered World Crisis. Splitting into two teams coordinated by Sally, Cream, and NICOLE from the Sky Patrol, they set out to rescue as many of the civilians as they could. Despite their valiant efforts, the task proved overwhelming, and Sonic began to exhibit further signs of transformation as the stress got to him. Fortunately, Captain Amanda Tower and the Letter of Gabriel arrived with G.U.N. support forces to take over the rescue effort. However, the Freedom Fighters were soon informed of another piece of bad news: Muttski called in from Spagonia University to inform them that Chuck and his colleague Professor Pickle had been abducted by Eggman's forces.

Sonic and the Freedom Fighters managed to locate the captured scientists aboard an Egg Train heading for the Rail Canyon Zone. Intercepting it in Soleanna Forest Zone, the group split into two teams to board the train in an effort to rescue Chuck and Pickle. Sonic's team-which also included Antoine, Tails, and Amy-were tasked with locating the missing captives, and initiated a car-by-car search. However, the other group had the misfortune of alerting E-106 Eta to their presence, and the robot's rampage soon had the train accelerating uncontrollably. After fighting a number of Badniks, Sonic located his uncle and the professor, only for Eta to arrive in the car ready for a fight. The battle with the super Badnik proved more challenging than Sonic expected, and the stress of the moment caused him to exhibit further signs of transformation. Fortunately, Amy arrived just in time to subdue Eta, and the heroes were able to escape the train with the two scientists. A subsequent debriefing made the Freedom Fighters aware of the existence of Dark Gaia and the effects of its essence, which Sonic-despite his efforts to appear nonchalant-was troubled by given his previous exposure to it. The Freedom Fighters were thus left with a new quest: to locate the missing Gaia Temples and Chaos Emeralds in order to restore the shattered planet.

The search took Sonic, Amy, and Rotor to a seemingly uninhabited coastline, where they heard a mysterious voice coming from underground. Soon enough, Razor the Shark arrived to lead them to the Eusebes Shrine, where they were introduced to the voice's owner: Coral the Beta. The trio spent some time exploring the shrine and its adjacent Chao Garden, and getting to know Razor, Coral, and Coral's apprentice Pearly the Manta better. Unfortunately, the pleasant visit was interrupted by the arrival of Captain Striker and the Meropis City Guard, who demanded to know what the surface Mobians were doing in the sacred shrine. After a heated discussion, Sonic and Amy volunteered to accompany Coral and the guard in appearing before King Puff and Queen Angelica, rulers of the city of Meropis. Sonic attempted to explain that the recent problems that had befallen the city were caused by Eggman shattering the planet, but the king and queen refused to believe him. They thus stripped Coral of her title, and informed the Freedom Fighters that they were required to leave the city the following day. Sonic and Rotor briefly argued over helping Coral and her friends, but Amy diffused the situation and suggested that they take them aboard the Sky Patrol. Unfortunately, Coral was unable to maintain the city's mystical shield due to the stresses put on her, and it collapsed, allowing city and shrine to be swarmed by Dark Gaia's Minions.

Sonic, his teammates, and Razor managed to fight off the first wave to attack the shrine, and Sonic and Rotor left to aid the city's defenders and see about getting help for the shrine. Sonic grabbed a pair of Air Charms to allow the pair to breathe underwater, and they soon located Captain Striker. Unfortunately, he refused to send any support to the shrine while the city was under attack, and Sonic and Rotor were left to continue fighting in defense of Meropis. They soon ran into the commander of the minions, a hideous Dark Guardian, and began to battle it. Unfortunately, they realized too late that their Air Charms weren't fully charged, leaving them on the bottom of the ocean with no air to breathe. Sonic began to transform again, only to be interrupted by the Guardian throwing Rotor into him. Just when the pair seemed doomed, however, an unexpected ally arrived: Chaos. Creating air bubbles around the pair, Chaos attacked the Guardian with the ocean as his weapon, alerting Sonic and Rotor to the fact that Chaos was responsible for the oceans remaining in place despite the planet breaking apart. The battle soon ended and Coral restored the shield, and she was subsequently reinstated as priestess. Tikal provided some counsel to help the heroes on their quest, and they set out with a new supply of Power Rings for the Sky Patrol.

The Beast Within
On their way to Soumerca in their continuing search for the Chaos Emeralds and Gaia Temples, Sonic and the others were treated to a tour of the Sky Patrol by Rotor, who also handily dispatched the attacking War Walrus Horde Commander. Sonic, Sally, and Amy were then deployed to recover a Chaos Emerald, only to run into a new enemy-E-113 Xi-and old friends-Mighty and Ray. After comparing notes, the two heroes introduced Sonic's team to their mentor Moss the Sloth, who sensed the darkness that Sonic had been struggling to contain within himself. Once again doing his best to assure his friends that he had things handled, he requested that Amy use her newly learned Mystic Melody to locate the Emerald. Joined by Mighty and Ray, the trio journeyed to the nearby Soumerca Egg Army base, only to be ambushed by Egg-Boss Thunderbolt, whose electrical attack proved the final push to complete Sonic's transformation into the savage Werehog.

Enraged and feral, Sonic attacked and swiftly defeated the Egg Soldiers, and would have killed Thunderbolt had Mighty not engaged him. Between the Armadillo's efforts and Amy and Sally talking him down, Sonic gained a measure of control over himself. The group then returned to Moss' hut, and the return of daylight saw Sonic returned to his normal self. However, he quickly resolved that he couldn't afford to return to the Sky Patrol until he got his new savage side under control. He thus joined Mighty and Ray under Moss' tutelage, though as usual he initially found himself trying to prove his own superiority. Moss quickly deduced that the root of his problem was his need to be in control, and that mastering his Werehog form would require acceptance of his own uncontrollable nature. After gaining this mastery, Sonic found himself confronted by another attack from Thunderbolt: the Flying Dynamo. However, with his new powers and the aid of Mighty and Ray, he proved triumphant, and soon returned to the Sky Patrol. Finding his teammates beaten and weary after a failed attempt to recover another Chaos Emerald, he rallied their spirits, reminding them of their previous successes. Unfortunately, even Sonic was appalled when Nicole revealed that another Chaos Emerald was in the hands of an old enemy: none other than Breezie.

After sharing the story of Breezie's betrayal-and his reasoning for not doing so beforehand-Sonic learned that he, Amy, and Tails had been accepted into Breezie's Chaos Emerald Championship as competitors, but that the other Freedom Fighters had been denied entry. Rotor proposed stealing the Emerald given the stakes, which Sonic liked the idea of, but Sally and Amy both spoke against it. After learning that Sally had also attempted to buy the Emerald from Breezie, Sonic joked with her about how her father felt about her use of the kingdom's funds in both this attempt and hiring the Chaotix to help find the Emeralds. Sonic and the rest of Team Fighters traveled to Casino Park, where they were greeted by Breezie and had the tournament rules explained. Looking to keep his Werehog form out of the public eye, Sonic insisted that his matches take place during the day, and threatened to walk out when Breezie didn't want to accommodate him. After succeeding in this, Sonic and his friends met Honey the Cat, Amy's favorite fashion designer, who was also entering the tournament. She proved sympathetic to their cause, offering to give them the Chaos Emerald in the event that she won the tournament. In the first round Sonic triumphed over the human fighter Segata Sanshiro, and after briefly basking in the adulation of the crowds was informed by Amy that the sun was about to set. He quickly returned to his room and transformed, and dejectedly settled in to watch the rest of the matches on TV. The first round ended with Tails eliminated from the tournament, and Sonic was paired with Honey for the second round.

Sonic took a breather from laughing at his foes when he notices Tails pouting over his loss in the previous round. Tails explained that he was upset that people all over Mobius got to see him lose like a chump, but Sonic assured him that he was seen as a hero. He then turned his attention to Espio, who despite Sonic's expectation wasn't happy to see his loss to Bean the Dynamite avenged due to his suspicions that Breezie was manipulating the tournament. Agreeing with the ninja's assessment but deciding there was little to be done about it, Sonic later sat down to watch Amy's second round match against Knuckles. He would visit her in the hospital following her loss-which came about mostly due to her own distraction-and then left to prepare for his own match with Honey. Despite the Cat's trickery, he managed to defeat her, and went on to the final match along with Knuckles. The two soon met in battle, with each boasting that he would achieve victory and had won their previous confrontations. Upon learning that Knuckles had left Angel Island after being forced to shatter the Master Emerald, Sonic offered to throw the fight so that Knuckles could resume his quest. Knuckles refused and the battle continued, until Metal Sonic broke into Casino Park thanks to the Hooligans' sabotage. Putting aside their fight and teaming up with Sonic's teammates, Espio, and Honey, they managed to recover the Emerald. Knuckles and Chip were then invited to join the Freedom Fighters aboard the Sky Patrol, and agreed to do so. While traveling aboard the Speed Star, however, the pair were treated to an unexpected surprise as Sonic transformed into the Werehog. Shortly thereafter, Sally received a distress call from Gregorios in Apotos. Sonic and the other Freedom Fighters subsequently traveled there in search of him, only for Sonic to run afoul of Dr. Eggman and a patrol of Egg SWATs. Their battle was interrupted by the arrival of the Ifrit through a strange phenomena known as the Genesis Portal, but Sonic was able to drive it back through with help from Silver the Hedgehog.

On another trip in Apotos, this time accompanied by Antoine and Chip, Sonic was forced to battle a force of Badniks. He and his companions then found Gregorios, who led them to the hidden Gaia Gate. He explained that they could use it to access the Gaia Temples without finding them through the use of the Gaia Keys, thought Sonic took occasion to mock Antoine's reactions to various bits of information he gave them. Gregorios then provided the trio with a list of names of families who protected the keys, wishing them luck as they departed. Sonic transformed into the Werehog yet again and expressed his hope that he would return to normal once the world was restored, while Chip hoped that his memories would return. They were then forced to deal with a force of Dark Gaia's Minions led by a Dark Gaia Titan, but were joined by Bunnie, Knuckles, and Amy. After defeating the creature and recovering a Master Emerald shard from it, Sonic and his friends passed on their new information to their reinforcements. The revelation of the Gaia Keys opened the way for Amy and Knuckles to leave in search of the Master Emerald shards, and Sonic found himself being teased over his reaction to the thought of Amy leaving. Sonic and Silver unexpectedly crossed paths again while Sonic was attempting to recover the final unclaimed Chaos Emerald from Metal Sonic. While pursuing his rival through the Crystal Desert Zone with Bunnie and Tails, he ended up grabbing a hold of Metal Sonic and being dragged through a Genesis Portal into the Burning Ruin Zone. There he met Silver, and was distracted enough that Metal Sonic was able to punch him in the stomach and escape. After exchanging greetings, Silver revealed that he was still in the process of finding and closing the various Genesis Portals, a large number of which led to Sonic's world in his present. They then set out to stop Metal and find a portal Sonic could use to return home once he recovered the Chaos Emerald. They eventually succeeded, trapping Metal Sonic in another dimension while Sonic returned home with the Emerald.

Rise of Sigma

 * See also: Sonic Man.

The Freedom Fighters' search for the final Chaos Emerald led Sonic to the planetary fragment on which Green Hill Zone rested, and he wound up running underneath it. Following a reading from Tails, he located a Mobini bird and another Master Emerald shard. While noting with some cockiness that he was effectively "doing Knuckles' job for him," Sonic bemoaned the fact that they couldn't detect the Chaos Emeralds more reliably. Unfortunately, he soon had other worries to occupy him, as Zavok, Zeena, and Zor of the Deadly Six-under the control of Sigma-1-attacked him. Though he put up a fierce fight, the weight of numbers and the powers of their Sigma Armor saw him defeated by the wreckage of numerous Badniks. He was then brought to Sigma's new base on the Lost Hex along with a captured Mega Man, both heroes having been captured on the suggestion of their nemeses Eggman and Dr. Wily, both of whom had been enslaved by Sigma. The two while unconscious were then transformed into the latest Roboticized Masters, and Sonic Man was dispatched to Mega City to set up one of Sigma's Unity Engines. The Light Robot Masters appeared to challenge him, but proved no match for the corrupted Sonic.

As such, Dr. Light was forced to call upon Quake Woman and some "reformed" members of Wily's Robot Masters to try their luck. Unfortunately, they had little better luck than their predecessors, and Break Man similarly proved to be no match for Sonic Man. As a result, he was able to complete setup of his Unity Engine, and Sonic's World and Earth 20XX began to merge together. This led to Sonic Man and M'egga Man being brought together, and the activation of another set of programming installed by Eggman and Wily. The two then attacked each other, and eventually returned each other to their original forms. Joined by X, a heroic robot from Mega Man's future, and Sticks the Badger, a resident of another world with it's own Sonic, and their allies, the heroes then boarded the Sky Patrol to launch their campaign against Sigma. While in flight, the heroes determined that the effects of their worlds being merged together was causing the Unified World to deteriorate. After being unexpectedly joined by Eggman, Wily, and Xander Payne, they learned that Sigma's plans involved fusing more worlds together and obtaining infinite power by draining their power. The heroes thus set course for the Lost Hex; along the way, Sonic talked to Mega Man about their previous encounter. Though he couldn't remember the events, Mega Man could tell that his blue friend was exaggerating the events somewhat.

Sonic and his fellow heroes then joined together in facing the Deadly Six and Sigma's Mechaniloid army, with Sonic encouraging Mega Man not to take the situation so seriously. Unfortunately, he would subsequently be attacked Mega Man and their other robotic allies, who fell under the technology-manipulating powers of the Zeti. Sonic and his organic teammates were thus forced to engage their friends, but due to their desire not to harm them were forced to retreat inside the Sky Patrol. Fortunately, Eggman and Wily managed to halt the villains and their unfortunate puppets using their Egg-Wily Uppity Robot Scrambler Cannon. The heroes' troubles were from over, however, as Sigma emerged from the Lost Hex in a massive new robotic body, accompanied by an army of Mavericks. Weary from their previous battles, the heroes engaged the Mavericks, but were unable to stop the majority of them from scattering through Genesis Portals to attack other worlds. However, they were saved when Sticks returned from a trip to the Street Fighter Zone with some of that world's heroes, though Guile's Sonic Boom maneuver didn't impress Sonic. Given the chance to recover, the heroes prepared to follow Sigma's forces.

Sonic joined Break Man in traveling to the world of Alex Kidd, whom they soon recruited to their cause. They later rejoined their allies only to find the Sky Patrol destroyed, but joined the assembled force of heroes and villains in launching a massive attack on Sigma. While they succeeded in defeating his defenders and destroying his giant body, it proved to be a mere protective shell for his ultimate form. Sonic and Mega Man were thus forced to use the Chaos Emeralds to take him on, but even then would have failed had it not been for Eggman and Wily's interference. They managed to destroy Sigma, but his actions had left reality dangerously damaged, and it was only Xander Payne's quick-thinking that saved the universe from annihilation. However, the events of the conflict with Sigma were undone, and Sonic found himself in touch with a very much alive Shadow. The battle wasn't entirely forgotten by Sonic, as he recalled once again fighting alongside Mega Man.

Restoring the World
Following this second interdimensional adventure, Sonic returned home and resumed his search for the Gaia Keys, though he soon ran afoul of Tundra the Walrus. Following this clash, he was reunited with Lupe Wolf, and together they set out to take down a Super Badnik. He would then lead Antoine and Big to Shamar, where an effort to protect the local Gaia Key Guardian would force them to team up with the Shamar Freedom Fighters against the Egg Army. Sonic, Tails and Chip then made a trip to Mazuri where Sonic distracted the Efrika Egg Army while Tails and Chip took the Gaia Key they had stolen. He later heads for the city of Chun-nan to search for the next key, where he is aided by Dulcy. However, after meeting the other Shijin Warriors, Sonic and his crew learn that the Gaia Key's guardian is trapped with the Dark Gaia Phoenix; a powerful phoenix spirit corrupted by Dark Gaia energy. The Freedom Fighters soon come up with a plan and that night Sonic (in his Werehog form) battles the Dark Gaia Phoenix to weaken it enough for Chip to restore it back to normal. After receiving the last Gaia Key, Sonic and Sally return to the Sky Patrol where they contact various allies and announce plans to stage a worldwide assault on the Eggman Empire as a distraction so they can fix the planet. After defeating Dark Gaia and restoring the world, Sonic bids farewell to Chip.