History BigBad / SonicTheHedgehog

* ''VideoGame/SonicCD''[[note]]Sonic CD was released after Sonic 2, but occurs before that game[[/note]]: Dr. Robotnik build [[EvilCounterpart Metal Sonic]] and tries to conquer Little Planet, a planet that appears once a year.

* ''SonicPinballParty'': Dr. Eggman brainwashes Sonic's friends.

** ''VideoGame/SonicRiders'': Dr. Eggman starts an Extreme Gear tournament and recruits the Babylon Rouges into helping him find ancient Babylonian technology. [[spoiler:The final boss is a Babylonian Guardian]]

** ''VideoGame/SonicFreeRiders'': [[spoiler:Dr. Eggman, who used his disguise of [[PaperThinDisguise King Doc of Toreggmania]] who organized another Extreme Gear tournament in order to obtain the racing data of it's participants and become the best racer in the world.

%%* Waku Waku Sonic Patrol Car & SegaSonic arcade series

[[folder:Main Games]]
%%* The original trilogy

* ''VideoGame/SonicAdventure2'': Dr. Eggman once again attempts to collect the Chaos Emeralds, this time to power the [[SpaceStation Space Colony ARK]]'s cannon and terrify the world into surrendering to him, with Shadow the Hedgehog and Rouge the Bat as his CoDragons. [[spoiler:However, it is later revealed that while Eggman's the face of the operation, it's Shadow who's masterminding it. Later, in the Last Story, they both team up with the heroes (along with Rouge) [[note]] Enemy Mine in Eggman's case, Heel–Face Turn in Shadow's [[/note]] to fight the Biolizard/Final Hazard, Dr. Gerlad Robotnik' creation who is trying to destroy the planet on behalf of its creator.]]

* ''VideoGame/SonicMania'': Dr. Eggman seeks the [[ArtifactOfDoom Phantom Ruby]] to conquer the world. [[spoiler:Heavy King turns against him and tries to steal the Ruby for himself after Eggman's defeat in the Titanic Monarch, resulting in both becoming the FinalBoss.]]

%%* Sonic Spinball, Dr. Robtnik's Mean Bean Machine, Sonic 3D Blast, Knuckles' Chaotix
%%* Sonic Chaos, Sonic Triple Trouble, Sonic Blast, Sonic Labyrinth

%%* ''VideoGame/SonicShuffle'': Void
%%* ''VideoGame/SonicRiders''
%%* Sonic Advance trilogy + Battle & Pinball Party

* ''VideoGame/SonicRivals'' and ''VideoGame/SonicRush'': Eggman Nega, Dr. Eggman's more vile descendant from the distant future, serves as the main villain in the former series in contrast to [[BigBadDuumvirate working along with Eggman]] in the latter.

%%* ''Sonic Runners'': Dr. Eggman mind controlling beam again.

* ''ComicBook/SonicTheComic'' has the ruler of Mobius Doctor Robotnik who takes the role of overall BigBad however other villains try to take the role of BigBad.

** First Saga: In an interesting case for the franchise, Doctor Eggman ''isn't'' the main antagonist, being out of commission due to [[spoiler: suffering from IdentityAmnesia]] after the events of ''VideoGame/SonicForces''. Instead, the forces of Eggman Empire are now under the control of [[spoiler:[[DragonAscendant Neo Metal Sonic]]]], who intends to finish what Eggman started.

* ''VideoGame/SonicRivals'' and ''VideoGame/SonicRushSeries'': Eggman Nega, Dr. Eggman's more vile descendant from the distant future, serves as the main villain in the former series in contrast to [[BigBadDuumvirate working along with Eggman]] in the latter.

** ''Film/{{Sonic the Hedgehog 2|2022}}'': Robotnik returns in this role, now teaming up with (And Manipulating) Knuckles the Echidna in order to obtain the Master Emerald and use its power to [[TakeOverTheWorld conquer the multiverse]], driving Sonic to team up with Tails [[spoiler:and Knuckles after the latter's HeelFaceTurn]] to stop him.

* ''VideoGame/SonicAdventure2'': Dr. Eggman once again attempts to collect the Chaos Emeralds, this time to power the SpaceColony ARK's cannon and terrify the world into surrendering to him, with Shadow the Hedgehog and Rouge the Bat as his CoDragons. [[spoiler:However, it is later revealed that while Eggman's the face of the operation, it's Shadow who's masterminding it. Later, in the Last Story, they both team up with the heroes (along with Rouge) [[note]] Enemy Mine in Eggman's case, Heel–Face Turn in Shadow's [[/note]] to fight the Biolizard/Final Hazard, Dr. Gerlad Robotnik' creation who is trying to destroy the planet on behalf of its creator.]]

* ''VisualNovel/TheMurderOfSonicTheHedgehog'': [[spoiler:The Murder Express, the sentient Badnik train, influences Espio to kill Sonic so it can deliver him to Eggman just so Dr. Eggman can grant its wish of having the Conductor never leave the train.]]

* ''VideoGame/SonicAdventure2'': Dr. Eggman once again attempts to collect the Chaos Emeralds, this time to power the SpaceColony ARK's cannon and terrify the world into surrendering to him, with Shadow the Hedgehog and Rouge the Bat as his CoDragons. [[spoiler:However, it is later revealed that while Eggman's the face of the operation, it's Shadow who's really masterminding it. Later, in the Last Story, they both team up with the heroes (along with Rouge) [[note]] Enemy Mine in Eggman's case, Heel–Face Turn in Shadow's [[/note]] to fight the Biolizard/Final Hazard, Dr. Gerlad Robotnik' creation who is trying to destroy the planet on behalf of its creator.]]
* ''VideoGame/SonicHeroes'': Dr. Eggman has built up a fleet of battleships which he intends on using to conquer the world, and challenges Team Sonic to stop him, while Team Dark, Team Rose, and Team Chaotix go after him for their own reasons, [[spoiler:but it turns out to actually be [[EvilKnockoff Metal Sonic]] impersonating Eggman after [[AIIsACrapshoot betraying him]] and collecting all of the data from Sonic and the other characters just to fight Sonic]].

* ''VideoGame/SonicUnleashed'': Dr. Eggman and [[DestroyerDeity Dark Gaia]] serve as the antagonists, with Eggman being the one who split the world in pieces and aiming to harness Dark Gaia to conquer the world, while Dark Gaia, split into a legion of monsters, attempts to destroy the world, Sonic fighting Eggman by day and Dark Gaia's monsters by night, though [[spoiler:Dark Gaia defeats Eggman once awakened and serves as the final boss]].

* ''VideoGame/SonicFrontiers'': Dr. Eggman, this time, has gained control of the power of the Ancients and is behind the capture of Sonic's friends, and is ordering Sage to stop Sonic from saving them. [[spoiler:Except he's doing this to maintain the seal of [[EldritchAbomination THE END]], the mysterious voice that goads Sonic into fighting the Titans to free his friends, whom is actually an EldritchAbomination that wiped out the Ancients and wants to be free so it can continue destroying worlds and [[KnightTemplar bring the universe to order]].]]

* ''VideoGame/SonicAndTheBlackKnight'': King Arthur, a formerly just king that became corrupted and rules Camelot with an iron fist. [[spoiler:In reality though, Merlina is the true antagonist. Having manipulated Sonic into defeating King Arthur, she uses the scabbard of Excalibur's magic to make Camelot eternal...at the cost of unleashing the armies of the underworld upon it. Unlike most examples in the series, Merlina gets a HeelFaceTurn after her defeat.]]

* ''ComicBook/SonicTheComic'' has the ruler of Mobius Doctor Robotnik who takes the roll of overall BigBad however other villains try to take the roll of BigBad.

** After the Metal Virus is cured, [[BigBadEnsemble Eggman, Starline, and the Zeti]] alternate being the main villains of different smaller arcs between the Metal Virus and Imposters Sagas, but of all of them Starline is the most prominent, as he carries out actions across multiple arcs that all build towards a master plan meant to supplant Eggman as the greatest threat around.

** ''Film/{{Sonic the Hedgehog 2|2022}}'': Robotnik returns in this role, now teaming up with (And Manipulating) Knuckles the Echidna in order to obtain the Master Emerald and use it's power to [[TakeOverTheWorld conquer the multiverse]], driving Sonic to team up with Tails [[spoiler:and Knuckles after the latter's HeelFaceTurn]] to stop him.
** ''WesternAnimation/SonicDroneHome'': Unit, one of Robotniks Badniks, upgrades itself with material from a scrapyard and seeks to TakeOverTheWorld [[spoiler:before having a HeelFaceTurn after and intense battle with sonic and his friends.]]
%%* ''Anime/SonicX'': Dr. Eggman for the first two seasons, and Dark Oak for the thrid season

* ''Film/SonicTheHedgehog2020'': [[Characters/SonicTheHedgehogFilmSeriesDrRobotnik Dr. Robotnik]]. He's a government agent employed to track down Sonic and [[TheyWouldCutYouUp take the secrets of his powers]], which he does with extreme prejudice, although to exploit that power for himself. He continues this role in the [[Film/SonicTheHedgehog22022 sequel]], with the doctor being much more open with his villainy and seeking the Master Emerald to use its power to TakeOverTheWorld.

** ''VideoGame/SonicAdventure'': Dr. Eggman teams up with Chaos, the God of Destruction, to gather the Chaos Emeralds and turn Chaos into Perfect Chaos, destroy Station Square, and rebuild Robotnikland on top. [[spoiler:Until Chaos betrays Eggman and goes his own way destroying Station Square.]]
** ''VideoGame/SonicAdventure2'': Dr. Eggman once again attempts to collect the Chaos Emeralds, this time to power the SpaceColony ARK's cannon and terrify the world into surrendering to him, with Shadow the Hedgehog and Rouge the Bat as his CoDragons. [[spoiler:However, it is later revealed that while Eggman's the face of the operation, it's Shadow who's really masterminding it. Later, in the Last Story, they both team up with the heroes (along with Rouge) [[note]] Enemy Mine in Eggman's case, Heel–Face Turn in Shadow's [[/note]] to fight the Biolizard/Final Hazard, Dr. Gerlad Robotnik' creation who is trying to destroy the planet on behalf of its creator.]]
** ''VideoGame/SonicHeroes'': Dr. Eggman has built up a fleet of battleships which he intends on using to conquer the world, and challenges Team Sonic to stop him, while Team Dark, Team Rose, and Team Chaotix go after him for their own reasons, [[spoiler:but it turns out to actually be [[EvilKnockoff Metal Sonic]] impersonating Eggman after [[AIIsACrapshoot betraying him]] and collecting all of the data from Sonic and the other characters just to fight Sonic]].
** ''VideoGame/ShadowTheHedgehog'': Black Doom is the leader of an alien race known as the Black Arms, who spearheads a planetary invasion so they may devour the population, while Dr. Eggman has his own plans to conquer the world. Depending on which path you take and who you side with, G.U.N. may oppose you as well, although they fall more into the Hero Antagonist group.
** ''VideoGame/SonicTheHedgehog2006'': The overall antagonist is [[spoiler:Solaris the Sun God, who was split into Mephiles the Dark and Iblis and attempts to make himself whole again so he can KillAllHumans as revenge for being experimented on]], and is the TrueFinalBoss fought in the Last Episode. Each story has its own antagonist in turn:
*** Sonic's Story has Dr. Eggman, who kidnaps Princess Elise of Soleanna so he may combine her power with the Chaos Emeralds and rule over space and time.
*** Shadow's Story has Mephiles the Dark, [[spoiler:the consciousness of Solaris]] who orchestrates the events of the game so that he may [[spoiler:join with his other half, Iblis, and annihilate all of humanity]], while Shadow tries to stop him.
*** Silver's Story has Iblis, the lava monster [[spoiler:and raw power of Solaris]] who destroyed the BadFuture that Silver and Blaze came from.
** ''VideoGame/SonicUnleashed'': Dr. Eggman and [[DestroyerDeity Dark Gaia]] serve as the antagonists, with Eggman being the one who split the world in pieces and aiming to harness Dark Gaia to conquer the world, while Dark Gaia, split into a legion of monsters, attempts to destroy the world, Sonic fighting Eggman by day and Dark Gaia's monsters by night, though [[spoiler:Dark Gaia defeats Eggman once awakened and serves as the final boss]].
** ''Videogame/SonicColors'': Dr. Eggman builds the [[AmusementParkOfDoom Incredible Interstellar Amusement Park]] by enlsaving the alien Wisps and plans to [[spoiler:power his MindControlDevice with them and mind-control Sonic's world]].
** ''VideoGame/SonicGenerations'': The [[EldritchAbomination Time Eater]] kidnaps all of Sonic's friends and transports them to various worlds from Sonic's past, [[spoiler:though the monster is actually subservient to [[HijackedByGanon both Modern and Classic Eggman]]]].
** ''VideoGame/SonicLostWorld'': Zavok is the leader of the Deadly Six, members of a race known as Zeti, that Eggman attempts to use for his own gain. However, they end up hijacking his scheme and decide to destroy the world themselves as revenge. [[spoiler:That said, Eggman still ends up being the final boss following their defeat.]]
** ''VideoGame/SonicMania'': Dr. Eggman seeks the [[ArtifactOfDoom Phantom Ruby]] to conquer the world. [[spoiler:Heavy King turns against him and tries to steal the Ruby for himself after Eggman's defeat in the Titanic Monarch, resulting in both becoming the FinalBoss.]]
** ''VideoGame/SonicForces'': Dr. Eggman and [[MysteriousStranger Infinite]], having teamed up and successfully conquered the world, want to stop Sonic and the Resistance from overthrowing them.
** ''VideoGame/SonicFrontiers'': Dr. Eggman, this time, has gained control of the power of the Ancients and is behind the capture of Sonic's friends, and is ordering Sage to stop Sonic from saving them. [[spoiler:Except he's doing this to maintain the seal of [[EldritchAbomination THE END]], the mysterious voice that goads Sonic into fighting the Titans to free his friends, whom is actually an EldritchAbomination that wiped out the Ancients and wants to be free so it can continue destroying worlds and [[KnightTemplar bring the universe to order]].]]

** ''VideoGame/TailsSkypatrol'': Wendy Witchcart, a WickedWitch aiming to take over Cocoa Island with her three henchmen and turn anyone who opposes her into crystals.
** ''VideoGame/TailsAdventure'': Great Battle Kukku XV, the evil ruler of the imperial Battle Kukku Army who leads his forces to Cocoa Island in the hopes of seizing the Chaos Emeralds.
** ''VideoGame/SonicRivals'' and ''VideoGame/SonicRushSeries'': Eggman Nega, Dr. Eggman's more vile descendant from the distant future, serves as the main villain in the former series in contrast to [[BigBadDuumvirate working along with Eggman]] in the latter.
** ''VideoGame/SonicAndTheSecretRings'': The Erazor Djinn is the evil genie of the lamp that forces Sonic to gather the World Rings for him so that he may [[OmnicidalManiac erase Arabian Nights]] and remake it InTheirOwnImage, then move on to Sonic's world and do the same there.
** ''VideoGame/SonicAndTheBlackKnight'': King Arthur, a formerly just king that became corrupted and rules Camelot with an iron fist. [[spoiler:In reality though, Merlina is the true antagonist. Having manipulated Sonic into defeating King Arthur, she uses the scabbard of Excalibur's magic to make Camelot eternal...at the cost of unleashing the armies of the underworld upon it. Unlike most examples in the series, Merlina gets a HeelFaceTurn after her defeat.]]
** ''VideoGame/SonicBoomRiseOfLyric'' and ''VideoGame/SonicBoomShatteredCrystal'' has [[SnakesAreEvil Lyric]], an ancient cyborg snake who seeks to eradicate all organic life and replace it with machines via the chaos crystals in the former and the titular crystal in the later.

** In an interesting case for the franchise, during the first StoryArc Doctor Eggman ''isn't'' the main antagonist, being out of commission due to [[spoiler: suffering from IdentityAmnesia]] after the events of ''VideoGame/SonicForces''. Instead, the forces of Eggman Empire are now under the control of [[spoiler:[[DragonAscendant Neo Metal Sonic]]]], who intends to finish what Eggman started.
** Eggman is restored to the spotlight during the [[ZombieApocalypse Metal Virus Saga]], as he unleashes the [[TheVirus Metal Virus]] on the world, which quickly begins to overwhelm Sonic and his allies. However, near the end of the arc, a failed attempt by [[BigBadWannabe Doctor Starline]] to one-up Eggman results in [[EvilerThanThou the Deadly Six taking over their resources]] and seeking to use the Zombots to conquer what's left of the uninfected world.
** After the Metal Virus is cured, [[BigBadEnsemble Eggman, Starline, and the Zeti]] alternate being the main villains of different arcs, but of all of them Starline is the most prominent, as he carries out actions across multiple arcs that all build towards a master plan meant to supplant Eggman as the greatest threat around.

''Franchise/SonicTheHedgehog'' has had many enemies over the years, whether it be his primary enemy [[EmperorScientist Dr. Ivo "Eggman" Robotnik]], a MadScientist who leads the [[TheEmpire Eggman Empire]] and its proxy groups and regularly attempts to use his vast robot army to [[TakeOverTheWorld conquer the world]], or a VillainOfTheWeek.

''Franchise/SonicTheHedgehog'' has had many enemies over the years, whether it be his primary enemy [[EmperorScientist Dr. Ivo "Eggman" Robotnik]], a MadScientist who leads the [[TheEmpire Eggman Empire]] and its proxy groups and regularly attempts to use his vast robot army to [[TakeOverTheWorld conquer the world]], or a VillainofTheWeek.