History BigBad / KamenRider

* Fitting for a milestone celebration, ''Film/OOODenOAllRidersLetsGoKamenRiders'' has Shocker which, thanks to a [[ForWantOfANail change in history]], succeeded in defeating the Kamen Riders and taking over the world. By the present day, they've grown into a LegionOfDoom comprising all the villains in the ''Kamen Rider'' franchise up until that point.

* ''Series/KamenRiderGeats'' has been going through TheBigBadShuffle right up until the ''Yearning'' arc has [[spoiler:[[AlwaysABiggerFish Suel]] the Executive Producer of Desire Grand Prix reveal himself to the players and take over proceedings in order to enact [[TheEndOfTheWorldAsWeKnowIt the Grand End]] and begin the DGP again in another era.]]

* ''Series/KamenRiderOutsiders'' has [[TheComputerIsYourFriend Zein]], a supposedly BenevolentAI that seeks to study human benevolence, when in reality it seeks to [[HobbesWasRight subjugate mankind because of their capacity for evil]] which led to Foundation X initiating a master plan of gathering previous villains to oppose it. By episode 4, Zein [[EvilAllAlong dropped]] all of its benevolent pretenses and [[spoiler:plans to use [[DeadlyGame Kamen Rider Chronicle]] to trick humanity into wiping itself out]].

* ''Series/KamenRiderAgito'' had [[AbusivePrecursors the Overlord of Darkness]].

* ''Film/KamenRiderGeatsXKamenRiderReviceMovieBattleRoyale]] has [[DangerousDeserter Colus]] [[spoiler: the first Game Master of the Desire Grand Prix who transforms it into the Desire Royale.]]

* ''Series/KamenRiderGeats'' has been going through TheBigBadShuffle right up until the ''Yearning'' arc has [[spoiler:[[AlwaysABiggerFish Suel]] the Executive Producer of Desire Grand Prix reveal himself to the players and take over proceedings in order to enact [[TheEndOfTheWorldAsWeKnowIt the Grand End]] and begin the DGP again in another era.]]]]

* ''Series/KamenRiderGeats'' has a BigBadShuffle right up until the ''Yearning'' arc has [[spoiler:[[AlwaysABiggerFish Suel]] the Executive Producer of Desire Grand Prix reveal himself to the players and take over proceedings in order to enact [[TheEndOfTheWorldAsWeKnowIt the Grand End]] and begin the DGP again in another era.]]

* ''Series/KamenRiderRyuki'': Shiro Kanzaki organized the Battle Fight by dealing Advent Decks out to other Riders and [[spoiler:plots to rig it using a brainwashed [[DragonInChief proxy]] Odin and by setting up a long GroundhogDayLoop until he actually wins]] for his own wish, which is reviving his DeadAllAlong sister Yui]].

* ''Series/KamenRiderKabuto'': Masato Mishima is the NumberTwo of ZECT, a military corporation that protects humanity from shapeshifting aliens Worms. While ZECT is generally heroic, [[TokenEvilTeammate Mishima]] is shown to be TheSociopath who only wants to become the chief. He regularly antagonizes and tries to assassinate [[TheHero Tendou]] for using ZECT tech to fight Worms without his permission. After the leader of Worms [[spoiler:dies as the a DiscOneFinalBoss, Mishima willingly joins Natives, a rivaling Worms faction who've founded ZECT in self-defense, then hijacks their plan to convert humans into Worms ([[WellIntentionedExtremist due to their belief they can't co-exist otherwise]]) for himself.]]

** The film ''Film/KamenRiderDecadeAllRidersVsDaiShocker'' reveals that the Great Leader of Dai-Shocker was in fact none other than [[spoiler:[[Main/VillainProtagonist protagonist]] [[Main/AmnesiacHero Tsukasa Kadoya (Decade)]] himself, before losing his memory and wandering the multiverse. Returning to the World of Decade, Tsukasa regains his memory and becomes Great Leader once again, revealed as the mastermind behind Dai-Shocker's plan to destroy all Kamen Riders and invade all the A.R. Worlds only to be usurped by [[TheStarscream Nobuhiko Tsukikage]], an incarnation of [[Series/KamenRiderBlack Shadow Moon]] who is ultimately vanquished when Tsukasa joins with the previous Kamen Riders to dake down Dai-Shocker.]]

* ''Series/KamenRiderGaim'': The alien [[AlienKudzu Helheim Forest]] is this technically, since its invasion is the cause of the story, but most of the actual conflict comes from [[BigBadEnsemble various other figures]] either looking to combat it or take advantage of it, chiefly [[spoiler:Ryoma Sengoku of the Yggdrasill Corporation and [[MonsterLord Overlord Inves]], both of whom exploit their respective factions' resources to claim power.]] In fact, [[spoiler:Helheim's avatar [[TheDogWasTheMastermind DJ Sagara]] actually spends much of the series helping the protagonists, having put HumanityOnTrial to see who among them is worthy of becoming Helheim's next chosen]].

* ''Series/KamenRiderDrive'': The murderous androids hunted by SIU are led by the Heart Roidmude, who wants to kill humans out of FantasticRacism and for the [[AFatherToHisMen safety of his race]], even if they are only in for the former. It turns out his mindset was caused by [[spoiler:a MadScientist Tenjuro Banno, who has not only interfered with Krim Steinbelt's research on {{Artificial Human}}s and used Roidmudes as punching bags for his frustrations, but turned out to be NotQuiteDead and usurps Heart's position, with the remaining Roidmudes having to perform EnemyMine with humans.]]

* ''Series/KamenRiderSaber'' has a BigBadDuumvirate of [[spoiler:[[TheChessmaster Storious]] and [[EvilRunningGood Isaac/the current Master Logos]]]], who are working to remake the [[AkashicRecords Book of Omniscience]] so they can use it to remake the world InTheirOwnImage. [[spoiler:While Storious turns on Isaac later, both are equally responsible for different sections of the plot and it's not until both are defeated that the conflict is stopped.]]

* ''Film/KamenRiderXSuperSentaiSuperHeroTaisen'' has a BigBadEnsemble between Tsukasa Kadoya, leading a resurgent Dai-Shocker, and [[Series/KaizokuSentaiGokaiger Emperor (formerly Captain) Marvelous]] leading the Dai-Zangyack alliance of resurrected ''Franchise/SuperSentai'' villains, both of whom are looking to eliminate the heroes of each other's respective franchises. [[spoiler:However, in the end it turns out both were being used by [[Series/KamenRiderDecade Narutaki]]/the fake [[Series/KamenRiderV3 Doktor G]] and [[Series/ChoudenshiBioman Rider Hunter Silva]], who promptly combine the two organizations into the Shocker-Zangyack Alliance. Except Tsukasa and Marvelous knew they were being used and were playing along to figure out the villains' real plans. Once the Alliance is wiped out, the final opponent of the movie is Daiki Kaito (Diend), who commandeers the Big Machine all because Tsukasa's deception pissed him off.]]

* ''Series/KamenRiderKuuga'': The ancient Grongi tribe gets revived in modern time along with their MonsterLord N-Daguva-Zeba. Grongi engage in a ritualistic BodyCountCompetition Gegeru, and the one who manages to kill enough humans before [[TheHero Kuuga]] gets to them can challenge Daguva for his position. Daguva later shows [[spoiler:little interest in the game, as he only wants to see if humanity, or specifically the successor of his ArchEnemy, would become the "Ultimate Darkness" like Grongi in retaliation.]]

* ''Series/KamenRiderRyuki'': Shiro Kanzaki has created [[TransformationTrinket Advent Decks]] and handled them to different people to fight each other, and the last one standing gets their wish granted. Shiro then joins the Rider Fight himself via [[spoiler:a brainwashed [[NonActionBigBad proxy]]]] Odin for his own wish, which is [[spoiler:reviving his DeadAllAlong sister Yui (with the current being revealed as a Mirror World clone who [[YourDaysAreNumbered is about to disappear]]), with Shiro setting up a long GroundhogDayLoop until he actually wins]], and uses Mirror Monsters to escalate conflicts or to skew the odds in his favor.

* ''Series/KamenRider555'': Kyouji Murakami is the CEO of Smart Brain, a MegaCorp that secretly provides shelter and resources for the murderous Orphnochs, humans who have CameBackStrong as monsters, with personal belief that they are the next step in human evolution. He sends the company's elite assassins Lucky Clover in order to retrieve {{Transformation Trinket}}s from the heroes, which were intended to be used by future Orphnoch leaders. Later he uses his company's resources to motivate heroes to fight each other while looking for the Orphnoch King.
** ''Film/KamenRider555ParadiseLost'' has ''Series/KamenRider555'''s original BigBad, [[CorruptCorporateExecutive Kyoji Murakami]], at the head of the world run by Orphnochs. Though since he's now a [[BrainInAJar head in a glass tank]] for some reason, it's [[PsychoForHire Kamen Rider Psyga]] and [[spoiler:[[FaceHeelTurn Yuji Kiba/Kamen Rider Orga]]]] who serve as the main threats to our heroes. It's also revealed that Smart Brain is really led by a trio of blurred out faces on computer screens (one of whom is voiced by Goro Naya).
* ''Series/KamenRiderBlade'': The release of the monstrous Undead turns out to be the doing of [[spoiler:Hiroshi Tennoji, the [[CorruptCorporateExecutive Chairman of the BOARD]], and Yoshito Hirose, the supposed culprit, was acting on his orders and is DeadAllAlong. By the rules of the Stone of Sealing, if all Undead but one get defeated, [[RestartTheWorld all life on Earth would be repopulated by the last Undead standing]], which Tennoji plans to exploit by becoming Undead himself when only a few of them remain. Ultimately, [[DiscOneFinalBoss Tennoji gets killed]], and with the last Undead not belonging to any race, the Stone of Sealing unleashes TheHorde to wipe ''all'' life on Earth until the heroes figure out a solution.]]

* ''Series/KamenRiderKiva'': King is the tyrant of the vampire-like Fangire and the main antagonist of the 1986 storyline. He becomes the personal enemy of the ChivalrousPervert Otoya Kurenai after Otoya [[spoiler:enters InterspeciesRomance with Maya the Fangire Queen with her gradual HeelFaceTurn]]. Jiro, Ramon and Riki also have a grudge against King, as Fangires have committed genocide of their races in the past. In the 2008 storyline, King's will is continued by his [[TheDragon Dragon]] Bishop, and the conflict repeats with Otoya's son and King's OverlordJr. At the end [[spoiler:after Wataru and Taiga have reconciled, King gets revived as the FinalBoss]].

* ''Series/KamenRiderDouble'': Ryubee Sonozaki is TheDon of a mafia organization Museum, who distributes [[PowersAsPrograms Gaia Memories]] on Fuuto's black market, which [[TheHero Shotaro and Philip]] try to get rid of. He's also been shown to be [[spoiler:an {{Abusive Parent|s}} to the AmnesiacHero Philip and the rest of his family, and is planning an AssimilationPlot out of personal paranoia. After [[DiscOneFinalBoss Ryubee's defeat]], his project is taken over by his business partner, Jun Kazu of Foundation X, who are {{Evilutionary Biologist}}s with even longer history than Museum.]]

* ''Series/KamenRiderFourze'': Mitsuaki Gamou is the principal of Amanogawa High School attended by [[TheHero Gentaro]], and lets the faculty secretly offer drug-like [[PowersAsPrograms Zodiarts Switches]] to students in order to find ones compatible with Horoscopes Switches, disregarding if the student may die in the process. His goal turns out to be [[spoiler:finding NeglectfulPrecursors who've created the Core Switch, even if he has to betray his partners, evolve himself by any means necessary, kill the Core Child Kengo, and use Earth as fuel, because he can't wait for the safer way to look for them.]]

* ''Series/KamenRiderWizard'': Wiseman is the leader of TheHeartless Phantoms, and the kidnapper of [[TheHero Haruto Soma]] who've survived the mass HumanSacrifice used for Phantoms' initial creation. He's revealed to be [[spoiler:Sou Fueki, Soma's [[EvilMentor mentor]] and Koyomi's father, as he tries to perform an even larger ritual [[AntiVillain because Koyomi was]] brought BackFromTheDead incompletely. He [[DiscOneFinalBoss gets killed]] by [[DragonAscendant Gremlin]], a former SerialKiller, in pursuit of the PhilosophersStone.]]

* ''Series/KamenRiderGaim'': After the wormholes to an [[AlienKudzu invasive alien forest]] Helheim appear, Beat Riders and Yggdrasill Corporation slowly reassemble themselves into factions: [[spoiler:Those who want to preserve humanity, even if it means leaving most of the population to die; Those who welcome the Forest as long as only they can live as the strongest; And those who are trying to find a solution from within Helheim.]] However, the source of the problem turns out to be that [[spoiler:Helheim is [[GeniusLoci sentient]], had [[PlanetaryParasite multiple planets]] as victims, and DJ Sagara as its avatar has put HumanityOnTrial]].

* ''Series/KamenRiderGhost'': Initially, the Gamma monsters appear to be summoned by Chikara Saionji and his partner Alan in order to collect the Eyecons and use them with the Monolith to grant their wish. After [[DiscOneFinalBoss Chikara fails]], the Gamma are revealed to be [[spoiler:humans from a parallel world in remote-controlled costumes, led by the Emperor Adonis who believes in TheEvilsOfFreeWill, and later by TheUsurper Prince Adel, who tries to sacrifice both worlds for the AssimilationPlot to achieve godhood. On top of all that, Gamma's guardian deities Gammaizers turn out to have been manipulating the plot for a long time and [[YouHaveOutlivedYourUsefulness get rid of Adel]] after [[TheEmpath Takeru]] manages to get through him.]]

* ''Series/KamenRiderExAid'': Kuroto Dan, a {{narcissist}}ic CEO of Genm Corp game company, and Parado, a humanoid Bugster virus who wants to create "more friends", are the masterminds behind the Game Disease incidents, which causes videogame villains manifest themselves at the cost of a human life if not defeated by CR Riders in time. Later, it's revealed that [[spoiler:Dan's father Masamune Dan has predicted his son's actions before going to prison, and once released, takes over where they've left off in order to upload humanity into a videogame [[ControlFreak he'd have control over]]. Dan and Parado on the other hand, perform an EnemyMine with the heroes after some CharacterDevelopment.]]

** ''NEW WORLD: Kamen Rider Grease'' has [[TheStarscream Keiji Uraga]].

* ''Series/KamenRiderZeroOne'' has the [[AIIsACrapshoot Ark]], a sunken AI satellite behind [[RobotReligion MetsubouJinrai.net]] and the [[MonsterOfTheWeek Magia]] which seeks to KillAllHumans. It is the goal of [=MetsubouJinrai.net=] to reawaken it and [[MegaCorp ZAIA Enterprise]] to gain control over it. [[spoiler:While he gets offed by Uchuyaro Raiden using Breaking Mammoth, he manages to continue influencing events via [[MouthOfSauron As]] as she attempts to make more Arks through corrupting Aruto and Horobi, the latter who takes the FinalBoss position.]]

* ''Series/KamenRiderKuuga'', the first of the Heisei Riders, had [[BloodKnight N-Daguva-Zeba]], the Gurongi Lord.

* ''Series/KamenRiderRyuki'' had [[WellIntentionedExtremist Shiro Kanzaki]], one of the few [[NonActionBigBad Non-action Big Bads]] of the Heisei era.

* ''Series/KamenRider555'' had the [[CorruptCorporateExecutive Smart Brain heads]] and later the [[TrueFinalBoss Orphnoch King]].

* ''Series/KamenRiderBlade'' had [[CorruptCorporateExecutive Hiroshi Tennoji]], though at the end of the series [[spoiler:he was usurped by Kanai/Giraffa Undead, the last member of the Royal Clubs, who was ticked at being used by Tennoji. Ultimately however, the real Big Bad may just have been the [[SinisterGeometry Sealing Ston]]e, since it was what created the Undead in the first place.]]

* ''Series/KamenRiderKabuto'' had [[MilitaryMaverick Masato Mishima]] and eventually his collaborator [[ObfuscatingStupidity Negishi]].

* ''Series/KamenRiderKiva'' had [[VampireMonarch King/Bat Fangire]].

* ''Series/KamenRiderDouble'' had [[TheDon Ryubee Sonozaki]][==]/the Terror Dopant. He was the first big bad in a while to be revealed as one in the first episode. Most of the heisei Kamen Rider Big Bads are revealed after the halfway point or in the final arc.

* ''Series/KamenRiderFourze'' had [[EvilTeacher Mitsuaki Gamou]][[spoiler:/Sagittarius]], who heads Amanogawa High School. It is obvious that he has [[RedEyesTakeWarning red eyes]] whenever he wants to.

* ''Series/KamenRiderWizard'' had [[HiddenAgendaVillain Wiseman]], the master of the Phantoms [[spoiler: who is really an alter ego of none other than supposed BigGood, the White Wizard]]; by the end of the show, Wiseman is eventually [[spoiler:usurped by the sadistic [[SerialKiller Gremlin]]]]. In the post-script two-parter, the fifteen Heisei Riders are taken to an AlternateUniverse, home to the souls of defeated monsters, where they battle Amadum, a dark Wizard and evil overlord.

* ''Series/KamenRiderGaim'' had the [[EldritchAbomination Helheim Forest]], an invasive species threatening to overtake Earth. There are [[BigBadEnsemble a lot of other villains on the show]] who often take the lead for a time, but everyone on the show is simply trying to either fight against Helheim or take advantage of it.

* ''Series/KamenRiderDrive'' had a BigBadDuumvirate between Heart, Medic and Brain at the start. The show took numerous twists before the true villain is revealed: [[spoiler:[[MadScientist Tenjuro Banno]]]].

* ''Series/KamenRiderGhost'' had [[RebelPrince Alain]] and the mysterious man AKA [[DiscOneFinalBoss Chikara Saionji]] at first. After Sainoji is killed, the series then sets up Alan's father, the [[TheEmperor Gamma Emperor Adonis]], as the big bad. But Adonis turns out to be an AntiVillain. He is then usurped by [[spoiler:his own son and Alain's older brother, [[TheEvilPrince Adel]], who is in turn usurped by the [[EldritchAbomination Gammaizers]]]].

* ''Series/KamenRiderExAid'' had [[BigBadEnsemble Kuroto Dan and Parado]] at first, though the true villain is eventually revealed to be [[spoiler:[[CorruptCorporateExecutive Masamune Dan]]]].

* ''Series/KamenRiderBuild'' has [[BigBadEnsemble a whole bunch of villains]] all competing to harness the power of [[ArtifactOfDoom Pandora's Box]]. After many twists and turns, the real BigBad turns out to be [[spoiler:[[AliensAreBastards Evolto]]/[[EnigmaticMinion Blood Stalk]], the original owner of Pandora's Box who's been manipulating everyone, [[PlayingBothSides hero and villain]], from the start to achieve his goal of constructing the Pandora Tower and using it to [[OmnicidalManiac annihilate all life on Earth]].]]

** ''NEW WORLD: Kamen Rider Cross-Z'' has the show's GreaterScopeVillain [[spoiler:[[TheManBehindTheMan Kamen Rider Killbus]], the older brother of Evolto and the true leader of the Blood Tribe.]]

[[quoteright:250:https://static.tvtropes.org/pmwiki/pub/images/great_leader_giving_orders_ep78.jpg]]
[[caption-width-right:250:"[[Series/KamenRider Takeshi Hongo, welcome to Shocker!]]"]]

** ''Recap/KamenRiderJeanneAndKamenRiderAguileraGirlsRemix'' has Ms. Titan, the leader of a resurgent [[Series/KamenRiderStronger Black Satan]].

* ''Series/KamenRiderZeroOne'' has the [[AIIsACrapshoot Ark]], a sunken AI satellite behind [[ApocalypseCult Metsubou]][[RobotReligion Jinrai.net]] and the [[MonsterOfTheWeek Magia]] which seeks to KillAllHumans. It is the goal of [=MetsubouJinrai.net=] to reawaken it and [[MegaCorp ZAIA Enterprise]] to gain control over it. [[spoiler:While he gets offed by Uchuyaro Raiden using Breaking Mammoth, he manages to continue influencing events via [[DragonAscendant As]] as she attempts to make more Arks through corrupting Aruto and Horobi, the latter who takes the FinalBoss position.]]

* ''Series/KamenRiderRevice'' has Giff, the pagan god of the Deadmans who all the other villains are working to revive. Although he spends much of the series a GreaterScopeVillain who's either [[SealedEvilInACan sealed]] or [[OrcusOnHisThrone lurking in the shadows]], so his [[TheHeavy leading disciples]] could be seen as the {{Big Bad}}s up until he finally decides to take center stage.

* ''Series/KamenRider555'' had the [[CorruptCorporateExecutive Smart Brain heads]] (one of whom is voiced by Goro Naya) and later the [[TrueFinalBoss Orphnoch King]].
** ''Film/KamenRider555ParadiseLost'' has ''Series/KamenRider555'''s original BigBad, [[CorruptCorporateExecutive Kyoji Murakami]], at the head of the world run by Orphnochs. Though since he's now a [[BrainInAJar head in a glass tank]] for some reason, it's [[PsychoForHire Kamen Rider Psyga]] and [[spoiler:[[FaceHeelTurn Yuji Kiba/Kamen Rider Orga]]]] who serve as the main threats to our heroes.

* ''Series/KamenRiderRevice'' has Giff, the pagan god of the Deadmans who all the other villains are working to revive. Although there's several other villains who each [[TheHeavy take the lead]] for a time, they all ultimately answer to Giff.

* ''Series/KamenRiderRevice'' has Giff, the pagan god of the Deadmans who all the other villains are working to revive. Although he's sealed for the first half and spends most of the second half [[OrcusOnHisThrone lurking behind the scenes]], so his [[TheHeavy leading disciples]] ([[spoiler:Orteca and Hideo Akaishi]]) could be seen as the main villains on [[GreaterScopeVillain his behalf]] for much of it.

* ''Series/KamenRiderRevice'' has Giff, the pagan god of the Deadmans. He’s sealed for the first half, but the other villains are all working to revive him.

** The prequel ''[[Recap/KamenRiderSaberSpinOffSwordOfLogosSagaPart1 Sword of Logos Saga]]'' has [[spoiler:Master Logos]], and serves to show how his actions caused shaped the conflict of the series.

** ''[[Recap/ReviceLegacyKamenRiderVailPart1 Revice Legacy: Kamen Rider Vail]]'' has [[spoiler:Director Agariyama, who headed [[GovernmentConspiracy NOAH]] and caused the deaths of Junpei's parents so he could use him as a test subject.]]

** ''[[Recap/ReviceLegacyKamenRiderVailPart1 Revice Legacy: Kamen Rider Vail'' has [[spoiler:Director Agariyama, who headed [[GovernmentConspiracy NOAH]] and caused the deaths of Junpei's parents so he could use him as a test subject.]]

* ''Series/KamenRiderRevice'' has Giff, the pagan god of the Deadmans. He’s sealed for the first half, but the other villains had plans that revolves around reviving him.

* ''Film/KamenRiderBeyondGenerations'' has [[spoiler:Diablo, a "Devil of Mystery" connected with Shocker who is responsible for the BadFuture of 2071.]]

* ''Series/KamenRiderRevice'' has Aguilera, leader of the Deadmans [[spoiler:supposedly. In fact she's a figurehead for [[TheManInFrontOfTheMan Olteca]], who really controls the cult.]]

-->--The franchise's ultimate BigBad, the '''Great Leader''', [[HijackedByGanon revealed as the mastermind]] yet again in ''Series/KamenRiderStronger''.

%%* ''Series/KamenRiderSaberTrioOfDeepSin''

** The film ''Film/KamenRiderDecade/AllRidersVsDaiShocker'' reveals that the Great Leader of Dai-Shocker was in fact none other than [[spoiler:[[Main/VillainProtagonist protagonist]] [[Main/AmnesiacHero Tsukasa Kadoya (Decade)]] himself, before losing his memory and wandering the multiverse. Returning to the World of Decade, Tsukasa regains his memory and becomes Great Leader once again, revealed as the mastermind behind Dai-Shocker's plan to destroy all Kamen Riders and invade all the A.R. Worlds only to be usurped by [[TheStarscream Nobuhiko Tsukikage]], an incarnation of [[Series/KamenRiderBlack Shadow Moon]] who is ultimately vanquished when Tsukasa joins with the previous Kamen Riders to dake down Dai-Shocker.]]