History Main / CrossoverVillainInChief

* The Fanfic/MarvelGemsUniverse story ''Steven Universe: Secret Wars'' features ComicBook/{{Thanos}} bringing together multiple villains to fight [[WesternAnimation/StevenUniverse the Crystal Gems]] and Franchise/TheAvengers for him, and becomes the FinalBoss after they're all defeated.

* ''VideoGame/SuperSmashBrosBrawl'': while not technically the leader, Ganondorf is still TheDragon to CanonForeigner Tabuu, putting him at the head of an army that includes other franchise villains [[Franchise/SuperMarioBros Bowser, Wario]], [[Franchise/SuperMarioBros Petey Piranha]], [[Franchise/{{Metroid}} Ridley]], and [[VideoGame/Mother3 Porky Minch]].

* ''WesternAnimation/TurtlesForever'': While 1987 Shredder helps to initiate the plot, it's 2003 Alien Shredder who quickly becomes the main threat to the turtle teams.

* In ''ComicBook/JLAAvengers'', Krona fits this role, summoning all of the villains of the DC and Marvel universes as troops to toss against the heroes (and he has the power to make them obey -- the climax happens in his personal palace, made out of ''Galactus' corpse'').
* ''ComicBook/CrisisOnInfiniteEarths'' has an alliance of practically '''every villain''' from five different Earths being led by the Superman villains [[Characters/SupermanBrainiacCharacter Brainiac]] and Lex Luthor.

* Creator/MarvelComics 12-issue crossover series ''ComicBook/SecretWars1984'' has the godlike Beyonder abduct many of Earth's mightiest heroes (Fantastic Four, Avengers, the X-Men, Spider-Man) and likewise Earth's most dangerous villains (Absorbing Man, Ultron, Galactus, Enchantress). The two groups are deposited on a distant world, and set to a Goodies versus Baddies free-for-all. The Goodies decide upon Captain America as their leader; the Baddies settle upon ComicBook/DoctorDoom as their chief, though only after Doom orders Ultron to slay Kang the Conqueror as an object lesson.

** In ''ComicBook/SpiderMen,'' Mysterio's portal is responsible for Peter getting sent to Miles' universe. He also serves as their primary opposition in getting Peter home.

* In ''ComicBook/SonicTheHedgehogMegaManWorldsUnite'', [[VideoGame/MegaManX Sigma]] quickly establishes himself as the crossover's primary villain, as he merges Sonic and Mega Man's worlds together, [[MakeWayForTheNewVillains pushes aside both Dr. Wily and Dr. Eggman]], turns the Deadly Six into his servants, and sends an army of Mavericks into multiple universes.

* ''VideoGame/SuperSmashBrosBrawl'': while not technically the leader, Ganondorf is still TheDragon to CanonForeigner Tabuu, putting him at the head of an army that includes other franchise villains [[Franchise/SuperMarioBros Bowser, Wario]], [[Franchise/{{Kirby}} King Dedede]], [[Franchise/SuperMarioBros Petey Piranha]], [[Franchise/{{Metroid}} Ridley]], and [[VideoGame/Mother3 Porky Minch]].

* Creator/MarvelComics 12-issue crossover series ''ComicBook/SecretWars1984'' has the godlike Beyonder abduct many of Earth's mightiest heroes (Fantastic Four, Avengers, the X-Men, Spider Man) and likewise Earth's most dangerous villains (Absorbing Man, Ultron, Galactus, Enchantress). The two groups are deposited on a distant world, and set to a Goodies versus Baddies free-for-all. The Goodies decide upon Captain America as their leader; the Baddies settle upon ComicBook/DoctorDoom as their chief, though only after Doom orders Ultron to slay Kang the Conqueror as an object lesson.

* In ''ComicBook/SpiderMen,'' Mysterio's portal is responsible for Peter getting sent to Miles' universe. He also serves as their primary opposition in getting Peter home.
* In ''ComicBook/SpiderVerse'', the Spider-Men from the {{Multiverse}} fight against Morlun and his family, the Inheritors, before this villain murders every version of the friendly neighborhood.

* ''WesternAnimation/TurtlesForever'': While 1987 Shredder helps to initiate the plot, it's 2003 Alien Shredder who quickly becomes the main threat to the turtle teams..................

** ''Fanfic/CodePrime'': [[WesternAnimation/TransformersPrime Megatron]] is bar-none the biggest threat for the Autobots and the Black Knights to deal with. He's responsible for the problems plaguing Earth as he served as a mentor to [[Anime/CodeGeass Charles zi Britannia]] during the latter's childhood, allowing him to rise to power and become Emperor of Britannia. [[spoiler:Megatron fully cements this by killing Charles and sacking Pendragon because he was disappointed about Charles' ulterior motive in the Ragnarok Connection. This effectively decapitates Britannia, and the Decepticons emerge as the predominant villains of the entire series]].

** ''Fanfic/FairyMayCry'': By being the GreaterScopeVillain of the fanfic, [[VideoGame/DevilMayCry Mundus]] has taken this position, though not as much as the others as the likes of Zeref and Acnologia are [[EvilVersusEvil technically against him for their own reasons]] and don't even entertain the idea of a team-up. He's the one who provides Zeref's immortality curse and coerces Precht to turn to the dark side. He isn't as active as some of the other villains listed here due to being [[SealedEvilInACan stuck in the Underworld]], though the impact he has on the story is measurable by those characters and their deeds.

* ''Series/LegendsOfTomorrow'': Season 2 has the Legends battling the Legion of Doom, a team up of major villains from its parent shows ''Series/{{Arrow}}'' and ''Series/TheFlash2014''. As [[TokenSuper the only one with powers]] The Reverse Flash [[AsskickingEqualsAuthority pretty firmly establishes himself as the leader of this villain pack]], much to the others' annoyance, as they don't like being treated as lackeys.

** ''Fanfic/FairyMayCry'': By being the GreaterScopeVillain of the fanfic, [[VideoGame/DevilMayCry Mundus]] has taken this position, though not as much as the others. He's the one who provides Zeref's immortality curse and coerces Precht to turn to the dark side. He isn't as active as some of the other villains listed here, though the impact he has on the story is measurable by those characters and their deeds.

* In ''Fanfic/ShatteredSkiesTheMorningLights'', [[Manga/SailorMoon Chaos]] is the force behind Dead End, but as it can't take physical form, it uses [[Anime/SmilePrettyCure Joker]] as its [[TheHeavy Heavy]] and public face.

** ''Fanfic/JWITCHSeason1'': The ''WesternAnimation/JackieChanAdventures'' villains take center stage in this fic. Daolon Wong is a servant to Phobos, but he proves to be a far more vile villain than him. [[spoiler:Then [[BackFromTheDead Shendu]] takes the helm...for a grand total of a chapter, but still kills Cedric and nearly kills Miranda.]]

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* In ''Fanfic/TheDimensionalWar'', Ganondorf is definetely this. [[spoiler: Though Kylo Ren has some independence, it's clear Ganondorf is the dominant of the two.]]

** ''Fanfic/FrozenTurtles'': [[WesternAnimation/TeenageMutantNinjaTurtles2012 The Shredder (his 2012 incarnation)]] proves himself as the more formidable villain, [[spoiler: outright killing [[Franchise/{{Frozen}} Hans]] (having also terrified him)]] and growing obsessed with obtaining Elsa's power. [[spoiler: By ''Into the Unknown'', he's effectively gained ice powers of his own and, once again, becomes the most dominant force everyone has to face.]]

** ''Fanfic/WorldsCollideTMNT'': [[WesternAnimation/TeenageMutantNinjaTurtles2003 The Shredder (his 2003 incarnation)]] quickly establishes himself as the more formidable villain. Right when he encounters Aang, he brutalizes the young hero in a complete CurbStompBattle. Later on, he [[spoiler: exterminates Long Feng and the Dai Li in order to keep his position and prevent any usurpers from undermining his schemes]]. On the Day of the Black Sun [[spoiler: he launches Operation Dragon Slayer, in which he kills Ozai, orders the Foot Clan to dispose of the War Council, and effectively drain the Fire Nation's resources to unleash Sozin's Comet like an extinction-level asteroid impact]]. Even [[TheDragon Azula]] is terrified by him, [[spoiler:so much that when she learns of Ozai's death by his hand, she loses it and hands it to the heroes to finish him off]].

** ''Fanfic/CodePrime'': [[WesternAnimation/TransformersPrime Megatron]] is bar-none the biggest threat for the Autobots and the Black Knights to deal with. He's responsible for the problems plaguing Earth as he served as a mentor to [[Anime/CodeGeass Charles zi Britannia]] during the latter's childhood, allowing him to rise to power and become Emperor of Britannia. [[spoiler: Megatron fully cements this by killing Charles and sacking Pendragon because he was disappointed about Charles' ulterior motive in the Ragnarok Connection. This effectively decapitates Britannia, and the Decepticons emerge as the predominant villains of the entire series]].
** ''Fanfic/JWITCHSeason1'': The ''WesternAnimation/JackieChanAdventures'' villains take center stage in this fic. Daolon Wong is a servant to Phobos, but he proves to be a far more vile villain than him. [[spoiler: Then [[BackFromTheDead Shendu]] takes the helm...for a grand total of a chapter, but still kills Cedric and nearly kills Miranda.]]
*** Though it should be noted that unlike [[spoiler: Hans, Gothel, Ozai, or Charles]], [[spoiler: Phobos manages to survive (albeit depowered).]]

* ''Fanfic/GravitySoul'' features the respective {{Big Bad}}s of ''WesternAnimation/GravityFalls'' and ''Manga/SoulEater'', [[EldritchAbomination Bill Cipher]] and [[AnthropomorphicPersonification Asura]], teaming up to exact revenge on their enemies by [[DealWithTheDevil Asura making a deal with Bill.]] This causes the two [[FusionDance to merge into Kishin Cipher]], which makes the two more powerful and they begin bringing together antagonists from both shows to serve them.

* ''Fanfic/EquestriaGirlsAFairlyOddFriendship'': Once [[spoiler: the Dazzlings]] arrive on the scene, they quickly establish themselves as the main threat, proving to be more cunning, powerful, sadistic, and overall more dangerous than any other antagonist in the setting.

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[[folder:Live Action TV]]

* ''VideoGame/JoJosBizarreAdventureEyesOfHeaven'': Heaven Ascension DIO, an alternate version of Part 3 DIO that defeated the Manga/StardustCrusaders, is the master of the various villains from across the eight parts of ''Manga/JojosBizarreAdventure''.

* While she isn't the GreaterScopeVillain of the ''Franchise/KingdomHearts'' series, [[WesternAnimation/SleepingBeauty Maleficent]] certainly fills this role at various points throughout the series. [[VideoGame/KingdomHeartsI In the original game]], she's leading [[WesternAnimation/{{Hercules}} Hades]], [[Franchise/{{Aladdin}} Jafar]], [[WesternAnimation/TheLittleMermaid1989 Ursula]], [[WesternAnimation/TheNightmareBeforeChristmas Oogie Boogie]], and [[WesternAnimation/PeterPan Captain Hook]] (and WesternAnimation/{{Pete}} wandering about off-screen) in an effort to find the Seven Princesses of Heart and unlock the gate to Kingdom Hearts, a vast repository of knowledge and power.

* ''Fanfic/ThereWasOnceAnAvengerFromKrypton'': [[spoiler:The entire Krypton-force exist because Doctor Doom and Reed Richards have been [[MergedReality fusing other worlds]] with the Franchise/MarvelCinematicUniverse, bringing not just heroes but also villains like [[Franchise/Ben10 Vilgax]], [[WesternAnimation/SheRaAndThePrincessesOfPower the Horde]], [[WesternAnimation/VoltronLegendaryDefender the Galra Empire]], and the [[WesternAnimation/StevenUniverse Diamond Authority]]. All of this is for the purpose of [[WellIntentionedExtremist creating a strong enough force on Earth to defeat Thanos and prevent the Snap that devastated Doom's and Reed's timeline]]]].

* ''VideoGame/SuperSmashBrosBrawl'': while not technically the leader, Ganondorf is still TheDragon to CanonForeigner Tabuu, putting him at the head of an army that includes other franchise villains [Franchise/SuperMarioBros Bowser, Wario]], [[Franchise/{{Kirby}} King Dedede]], [[Franchise/SuperMarioBros Petey Piranha]], [[Franchise/{{Metroid}} Ridley]], and [[VideoGame/Mother3 Porky Minch]].