Big Bad / Kamen Rider

"You are all correct! The mastermind pulling the strings against the Kamen Riders was me all along!"

—The Great Leader, the franchise's ultimate Big Bad, hijacking the plot yet again in Kamen Rider Stronger.

The many Big Bads of Kamen Rider. In addition to television series, expect each of the associated movies (particularly the Summer Movies and Movie War crossovers) to have their own Big Bad as well.

---

Franchise-wide

• The textbook Big Bad for the various Showa-period Kamen Rider series was the Great Leader. Although we never learn precisely what it is, it's claimed to be everything from a (relatively) mundane mutant terrorist to a living embodiment of hate and suffering who will exist As Long as There Is Evil. Typically, if there was a series where it wasn't the Big Bad, it'd pop up in the next series and claim to have been the one bossing around the previous show's villains.

Showa Era

• Kamen Rider and Kamen Rider V3 both have the Great Leader, who was responsible for founding the evil organizations Shocker, Gel-Shocker and Destron, all in succession.
• Kamen Rider X introduces the series' first non-Great Leader Big Bad in the General Commander of GOD, a mysterious individual at the head of the Government of Darkness who used numerous objects as mouthpieces with no clue to his true form. Halfway through he stops sending messages and the true leader of GOD turns out to be the colossal King Dark (who is really a robot piloted by Doctor Noroi), with the implication that the GOD General Commander was either a flunky or alias used by him.
• Kamen Rider Amazon has the Ten-Faced Demon Gorgos, the leader of the evil Geddon. Halfway through, Geddon gets defeated and is replaced by the Garanda Empire led by Great Emperor Zero. Zero himself answers to the mysterious cloaked Ruler (who is unmasked as the True Great Emperor Zero; turns out the former Zero was just a decoy.), who claims in the final episode to have been The Man Behind the Man to Geddon as well.
• Kamen Rider Stronger sees the return of the Great Leader in a new form as the leader of the Black Satan organization. Following Black Satan's downfall two-thirds of the way through, the traitorous General Shadow seizes on the vacuum left by Black Satan to form his own Delza Army. Towards the end of the show however, the Great Leader returns and not only hijacks the Delza Army, but reveals himself to be behind both GOD and Geddon as well (no mention of the Garanda Empire though).
• Kamen Rider: Skyrider has the master of Neo-Shocker, who is yet another form of the Great Leader.
• Kamen Rider Super-1 has the Dogma Kingdom led by Emperor Terror Macro. Once they fall, their place is taken by Jin Dogma, the organization behind that organization, which is led by Marshal Demon.
• Birth of the Tenth! Gather All Kamen Riders!!, has the Badan Empire led by Ambassador Darkness, the Backup Twin of Ambassador Hell from the original Kamen Rider series. At the end of the film it's revealed Darkness was working for the Generalissimo of Badan, who (surprise, surprise) is really another incarnation of the Great Leader.
• Kamen Rider BLACK had the Creation King.
• Kamen Rider BLACK RX had General Jark of the Crisis Empire, who ultimately turned out to be subordinate to Grand Lord Crisis, who... may be Great Leader, it's not entirely clear, but they have the same voice actor in Gorō Naya, whose distinctive voice was Great Leader's calling card.
• Shin Kamen Rider: Prologue had the Syndicate as well as the CIA.
• Kamen Rider ZO had the Neo Organism.
• Kamen Rider J had the Fog Mother.

Heisei Era (Phase 1)

• Kamen Rider Kuuga: N-Daguva-Zeba, lord of the Grongi tribe and the one behind their Gegeru, where the Grongi who manages to kill enough humans before Kuuga gets to them can challenge Daguva for his position. Daguva later shows little interest in the game, as he only wants to see if humanity, or specifically the successor of his Arch-Enemy, would become the "Ultimate Darkness" like Grongi in retaliation.
• Kamen Rider Agito had the Overlord/Theos.
  • Kamen Rider Agito: Project G4 has Risa Fukami, the one in charge of Project G4.
• Kamen Rider Ryuki: Shiro Kanzaki organized the Battle Fight by dealing Advent Decks out to other Riders and plots to rig it using a brainwashed proxy Odin and by setting up a long "Groundhog Day" Loop until he actually wins for his own wish, which is reviving his Dead All Along sister Yui.
  • Kamen Rider Ryuki: Episode Final has Kamen Rider Ryuga, who is actually the Mirror counterpart of Shinji Kido.
• Kamen Rider 555: Kyouji Murakami/the Rose Orphnoch is the CEO of Smart Brain, the one supporting most of the Orphnochs in their rampages to sire more Orphonochs from humans, and the one employing the Lucky Clover assassins to retrieve Transformation Trinkets from the heroes, with his ultimate goal being to locate the Orphnoch King.
  • Kamen Rider 555: Paradise Lost also has Kyouji Murakami, now at the head of the world run by Orphnochs. Though since he's now a head in a glass tank for some reason, it's Kamen Rider Psyga and 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 may even be the Great Leader^note He's voiced by Goro Naya, whose distinctive voice was the Great Leader's calling card).
• Kamen Rider Blade: The release of the monstrous Undead turns out to be the doing of BOARD Chairman Hiroshi Tennoji, who intentionally set them loose in order to rig their Battle Fight so his own chosen candidate could win, granting him the power to remake the world. Alternatively, this role could go to the Stone of Sealing, which created the Undead and, when all the numbered and Royal Club Undead fall, unleashes The Horde to wipe all life on Earth until the heroes figure out a solution.
  • Kamen Rider Blade: Missing Ace has the Albino Joker.
• Kamen Rider Hibiki had The Man and The Woman and all their myriad clones. We don't even meet the actual originals until the finale. And its even possible that they aren't the originals after all...
  • Kamen Rider Hibiki & The Seven Senki has Kabuki, an Oni who defected to the Makamou, though he is eventually usurped by Hitotsumi.
• Kamen Rider Kabuto: Although the Worms are the main set of enemies this season and ZECT is the organization fighting them, the one antagonizing Souji Tendou the most is the Number Two of ZECT, Masato Mishima, who is only concerned with his own personal advancement and repeatedly tries to assassinate Tendou. After the leader of Worms is taken out, Mishima sides with the Native Worms who secretly founded ZECT and hijacks their plan to convert humans into Worms for himself.
  • Kamen Rider Kabuto: God Speed Love has Riku Kagami of all people, who in this timeline heads a conspiracy allied with the Worms to help the Next-Worms invade Earth. However, it's Issei Kurosaki/Kamen Rider Caucasus who is entrusted with ensuring that their Evil Plan goes off without a hitch, and the main threat faced by Kabuto and Gatack.
• Kamen Rider Den-O had Kai the Singularity Point and master of the Imagin.
  • Kamen Rider Den-O: I'm Born has Thief King Gaoh, who hijacks the Den-Liner so he can retrieve his own train, the Gaoh Liner.
• Kamen Rider Kiva: The 1986 storyline has the Fangire King, who wiped out most of the other demon races and is targeting next. The 2008 storyline has Bishop, who has stepped up to carry on King's will. At the end, Bishop revives King, who promptly becomes the Final Boss.
  • Kamen Rider Kiva: King Of The Castle In The Demon World has Kamen Rider Arc, who seeks vengeance against Kiva's current wielder.
• Kamen Rider Decade is complicated, taking place over a Multiverse of alternate realities to past Rider series, each with their own Big Bad. It eventually introduces Dai-Shocker, a Legion of Doom comprising villains and monsters from across Kamen Rider history, which goes through several leaders.
  • The World of Kuuga has N-Gamio-Zeda, the equivalent to N-Daguva-Zeba.
  • The World of Kiva has the Beetle Fangire, the equivalent to the Bat Fangire. He is eventually followed by Yuki, the Fangire Queen who is wed to Apollo Geist.
  • The World of Ryuki has Kamata (Kamen Rider Abyss), who turns out to also be the Paradoxa Undead, who was brought by Narutaki to this world from...
  • The World of Blade has Hajime Shijo, who transforms into both Kamen Rider Chalice and the Joker Undead. As it turns out, Kamata was The Dragon.
  • The World of 555 has Momose, the Tiger Orphnoch, the leader of the Lucky Clover at Smart Brain High School.
  • The World of Agito, with nary a mention of the Overlord, has the Buffalo Lord Taurus Ballista, the equivalent to the El Lords, who were the Co-Dragons to the Overlord.
  • The World of Den-O has the Alligator Imagin, who enacts his own scheme to change the past. Also appearing is Shilubara (Mimihiokko) as a Greater-Scope Villain, leading to the Den-O & Decade film in which he features alongside his brother Goludora (Kuchihiko), who stands as the Big Bad after Shilubara is slain.
  • The World of Kabuto has Soh Otogiri, the Phylloxera Worm,
  • The World of Hibiki, with nary a mention of the Man and the Woman, has Gyuki, actually a fallen Hibiki.
  • The World of Negatives, the Mirror Universe, has Otoya Kurenai (Kamen Rider Dark Kiva), leader of the Dark Riders and Alternate Self of the heroic, deceased Otoya Kurenai from Kiva. Uniquely, this Otoya survives his run on Decade.
  • The World of Diend, based on the filmKamen Rider Blade: Missing Ace, has Fourteen.
  • Special mention goes to the World of Shinkenger, the world in which Samurai Sentai Shinkenger takes place, where the heroic Shinkengers fight the monstrous Ayakashi, which is incorporated into Decade when the Hikari Studio crew visit for a crossover. The Big Bad for this arc turns out to be Chinomanako who steals the power of Kamen Rider Diend; as Shinkengers' is a world without Riders, Chinomanako's presence becomes a threat which requires the combined strength of Decade, Kuuga and the Shinkengers to put down. Dokoku Chimatsuri, leader of the Ayakashi and Big Bad of Shinkenger, does not appear but can be counted as a Greater-Scope Villain.
  • The World of Black RX has the Crisis Empire represented by Schwarian, whilst Emperor Crisis is mentioned as a Greater-Scope Villain. It is in this world that Dai-Shocker, represented by Apollo Geist, makes their first appearance, recruiting the Crisis Empire into their alliance. It is also established that Dai-Shocker previously recruited Gorgom, from the World of Black.
  • Apollo Geist himself, whose original incarnation was The Dragon to King Dark, hails from the World of X-Rider, with a new incarnation of King Dark appearing in All Riders vs. Dai-Shocker.
  • The World of Amazon has the Ten-Faced Demon Llumu Qhimil. Equivalent to Gorgos from Amazon, Llumu Qhimil the leader of Geddon, which is now a part of Dai-Shocker.
  • The film Kamen Rider Decade: All Riders vs. Dai-Shocker reveals that the Great Leader of Dai-Shocker was in fact none other than Tsukasa Kadoya, who masterminded Dai-Shocker's plan to destroy all Kamen Riders and invade all the A.R. Worlds, only to get amnesia and forget about it. He returns to the role, only to be usurped by Nobuhiko Tsukikage, who is really the A.R. incarnation of Shadow Moon.
  • In the World of the Rider War, a combination of the nine Heisei Rider worlds, Apollo Geist takes control of the remaining monsters, marrying the Fangire Queen and thus becoming the half-Fangire Super Apollo Geist.

Heisei Era (Phase 2)

• Kamen Rider Double: Ryubee Sonozaki is The Don of a mafia organization Museum and the one distributing Gaia Memories on Fuuto's black market, as part of a paranoia-fueled Assimilation Plot. After Ryubee's defeat, his Foundation X backers take over the project, with their researcher Jun Kazu becoming the Final Boss.
  • Kamen Rider W FOREVER: A to Z/The Gaia Memories of Fate has Katsumi Daido/Kamen Rider Eternal, the Ax-Crazy leader of the terrorist group who wants to turn everyone in Futo City into Necro-Overs in order to remake the city in his own image.
  • The Kamen Rider Accel spin-off movie has the vigilante Commander Dopant.
  • The Kamen Rider Eternal spin-off movie has Foundation X scientist Doctor Prospect, who runs a center for experimenting on people to become Quarks. It's revealed at the end of the movie that he's also responsible for Daido going off the deep end, making him indirectly responsible for his actions in The Gaia Memories of Fate as well.
• Kamen Rider OOO had Dr. Maki. Interestingly, he was supposed to just be the Arc Villain of the second arc, and Ankh was going to be the final villain, but things changed and he became a fully fledged Big Bad.
  • Kamen Rider OOO Wonderful: The Shogun and the 21 Core Medals has the Gara, an alchemist who served the original OOO who's looking to succeed where his master failed.
  • Kamen Rider OOO 10th: Core Medal of Resurrection has Ancient King OOO, the Greater-Scope Villain who created the Greeed 800 years ago, and who has now revived to try to conquer the world one more time. After he's defeated in the climax, the artificial Greeed Goda absorbs his leftover Core Medals and becomes the Final Boss.
• Kamen Rider Fourze: Mitsuaki Gamou is the ringleader of the Zodiarts and the one dealing Zodiarts Switches to students in order to find the twelve chosen Horoscopes, which he needs to complete his goal of finding Neglectful Precursors who've created the Core Switch.
  • Kamen Rider Fourze: Everyone Into Space has Groundyne and Skydyne, a Sibling Team of renegade robots looking to destroy humanity.
• Kamen Rider Wizard: Wiseman is the leader of Phantoms, the one behind the mass Human Sacrifice that led to their initial creation, and the one sending them out to create more. At the very end he's killed by Gremlin, who seizes the Philosopher's Stone and becomes the Final Boss.
  • In the post-script two-parter, the fifteen Heisei Riders are taken to an Alternate Universe, home to the souls of defeated monsters, where they battle Amadum, a dark Wizard and evil overlord.
  • Kamen Rider Wizard in Magic Land has Orma/Kamen Rider Sorcerer, aka the Drake Phantom, who caused the creation of the titular Magic Land so he could feed off the despair of its citizens.
• Kamen Rider Gaim: The alien Helheim Forest is this technically, since its invasion is the cause of the story, but most of the actual conflict comes from various other figures either looking to combat it or take advantage of it, chiefly Ryoma Sengoku of the Yggdrasill Corporation and Redyue of the Overlord Inves, both of whom exploit their respective factions' resources to claim power. In fact, Helheim's avatar DJ Sagara actually spends much of the series helping the protagonists, having put Humanity on Trial to see who among them is worthy of becoming Helheim's next chosen.
  • Kamen Rider Gaim: The Great Soccer Match! The Golden Fruit Cup! has Kougane/Kamen Rider Mars, the manifestation of an artificial Golden Fruit and the one luring the Riders into conflict with each other.
  • Kamen Rider Gaim Gaiden Kamen Rider Zangetsu has Kamen Rider Idunn, who turns out to be Touka Akatsuki, Takatora's childhood friend who was really a Tyke Bomb experimented on by Yggdrasill, who's now out for revenge.
  • Kamen Rider Gaim Gaiden Kamen Rider Baron has Alfred/Kamen Rider Tyrant, though Ryoma Sengoku (one of the Big Bad contenders in the series itself) isn't that far behind.
  • Kamen Rider Gaim Gaiden Kamen Rider Duke has Kugai Kudo, the head of the Black Bodhi cult who seeks become a god using Yggdrasill's research, though he can't really be said to be any more "bad" than Ryoma himself. The ending also reveals that Kugai Kudo enabled the villain below.
  • Kamen Rider Gaim Gaiden Kamen Rider Knuckle has Shura/Kamen Rider Black Baron, the founder of a fight club based on perversions of Kaito's ideals.
• Kamen Rider Drive: The Heart Roidmude is the main leader of the Roidmude uprising and the one behind the majority of their plots. Other villains occasionally take the lead at different points, most notably Medic and Freeze, but Heart is Shinnosuke's most persistent foe. At least until Tenjuro Banno, the one who corrupted the Roidmudes in the first place, gets loose and hijacks the role from Heart's position, with the remaining Roidmudes teaming up with Drive to stop him.
  • Kamen Rider Drive: Surprise Future has Roidmude 108/Kamen Rider Dark Drive, who seeks to create an eternal Global Freeze.
  • Kamen Rider Drive Saga: Kamen Rider Chaser has the Angel Roidmude, who wants to end the conflict between humans and Roidmudes by force.
  • Kamen Rider Drive Saga Kamen Rider Heart has Roidmude 5886, a Roidmude formed from the collective data of all the Roidmudes.
  • Kamen Rider Drive Saga Kamen Rider Mach has Roidmude 005, who respawned from Roidmude 5886 and evolved into the Revenger Roidmude.
• Kamen Rider Ghost: The Gamma Prince Adel, who was the one to suggest the Gamma invade the human world in the first place. His role as this is bolstered when he usurps his father as the Gamma Emperor and tries to sacrifice both worlds for the Assimilation Plot to achieve godhood. When Takeru manages to get through him, the Gammaizers (the Gamma's guardian deities) hijack the role out from under him and become the final boss.
  • Set during Ghost, the film Kamen Rider 1 sees the return of Shocker, only without the Great Leader. Now it is led by Ambassador Hell and is pitted in an Enemy Civil War against Nova Shocker, led by a new monster, Urga.
  • Kamen Rider Ghost: The 100 Eyecons and Ghosts Fated Moment has Argos/Kamen Rider Dark Ghost, who wants to turn everyone on Earth into ghosts.
  • Kamen Rider Ghost REBIRTH Kamen Rider Specter has Danton, who was originally a co-creator of Gamma World, who now seeks to forcibly alter the people of Gamma to fit his view of a better society.
• Kamen Rider Ex-Aid: In the beginning its Bugster executive Parado and Genm Corp CEO Kuroto Dan masterminding the Bugster attacks. After many twists and turns, it's revealed that both were being manipulated by Masamune Dan, Genm Corp's founder and Kuroto's dad, in his scheme to upload humanity into his video game and become the controller of everyone's fates.
  • Kamen Rider Ex-Aid: True Ending has Johnny Maxima, the CEO of Machina Vision and former business partner of Ex-Aid's Big Bad.
  • The Another Ending Trilogy has Kuroto Dan, who's returned to being evil now that his father and the Bugsters are no longer a threat.
• Kamen Rider Build has a whole bunch of villains all competing to harness the power of Pandora's Box. After many twists and turns, the real Big Bad turns out to be Evolt/Blood Stalk, the original owner of Pandora's Box who's been manipulating everyone, hero and villain, from the start to achieve his goal of constructing the Pandora Tower and using it to annihilate all life on Earth.
  • Kamen Rider Build: Be The One has Kamen Rider Blood and his two cohorts, who brainwash all of Japan to turn them against Build so they can enact their scheme to destroy the world.
  • NEW WORLD: Kamen Rider Cross-Z has the show's Greater-Scope Villain Kamen Rider Killbus, the older brother of Evolt and the true leader of the Blood Tribe.
  • NEW WORLD: Kamen Rider Grease has scientist-turned-terrorist Keiji Uraga, whose experiences as a test subject for Faust have left him with a hunger for power.
• Kamen Rider Zi-O has Zi-O's evil future self, Oma Zi-O, who rules the future but doesn't do much directly to influence the plot in the present. Instead, the main antagonists are the Time Jackers, a trio of so-called "freedom fighters" from the future with time manipulation powers looking to alter the flow of time replacing the Kamen Riders throughout it with their own Another Riders so the future will be ruled by their own king as Oma Zi-O. Except it's later revealed that this is a ruse. The Time Jacker Swartz is the one behind Oma Zi-O's rise to power, using the Another Riders to guide Sougo down the path to becoming a Demon King.
  • Kamen Rider Zi-O: Over Quartzer has the Quartzer, led by an alternate Sougo Tokiwa/Kamen Rider Barlckxs. Not only is he the Big Bad of this film, but it's also revealed that he's the Greater-Scope Villain of Kamen Rider Zi-O as well, having played a role in the rise of Oma Zi-O.
  • Kamen Rider Zi O Next Time Geiz Majesty has White Woz, who was previously an Arc Villain in the series itself, having now returned as Another Diend.

Reiwa Era

• Kamen Rider Zero-One has the Ark, a sunken AI satellite behind MetsubouJinrai.net and the Magia which seeks to Kill All Humans. It is the goal of MetsubouJinrai.net to reawaken it and ZAIA Enterprise to gain control over it. While his phsyical body gets offed by Uchuyaro Raiden using Breaking Mammoth, he manages to continue influencing events via As as she attempts to make more Arks through corrupting Aruto and Horobi, the latter who takes the Final Boss position.
  • Kamen Rider Zero One REA Lx TIME has Kamen Rider Eden until gets usurped in the film's climax by Behru, who steals his Driver to become Kamen Rider Lucifer.
• Kamen Rider Saber has a Big Bad Duumvirate of Isaac/the current Master Logos and Storious, who orchestrated everything in a bid to obtain the Almighty Book so they can use it to remake the world In Their Own Image. The former takes the lead for most of the story while the latter swoops in at the very end to be the Final Boss.
  • Kamen Rider Saber: The Phoenix Swordsman and the Book Of Ruin has Bahato, the titular "phoenix swordsman". He later returns in the series itself and gets Demoted to Dragon.
  • The prequel Sword of Logos Saga has Master Logos, whose role in causing the conflict of the series is fleshed out by the special.
  • Kamen Rider Saber: Trio of Deep Sin has Shinjiro Shinozaki in a Big Bad Duumvirate with Mamiya and Yuina Tachibana, the former of whom is responsible for them all being able to become Kamen Rider Falchion. The Mumeiken Kyomu is implied to be sentient, and serves as the Greater-Scope Villain by way of empowering each of them.
• Kamen Rider Revice 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 Greater-Scope Villain who's either sealed or lurking in the shadows, so his leading disciples could be seen as the Big Bads up until he finally decides to take center stage. After Giff's defeat Vice becomes the Final Boss, if only in a bid to save Ikki.
  • Kamen Rider Revice: The Mystery has Suzu Saionji.
  • Revice Legacy: Kamen Rider Vail has Director Agariyama, who headed NOAH and caused the deaths of Junpei's parents so he could use him as a test subject.
  • Kamen Rider Revice: Battle Familia has terrorist leader Azuma, another Giff worshipper and one of two ancient humans who received immortality from Giff looking to "judge" humanity.
  • Kamen Rider Jeanne & Kamen Rider Aguilera with Girls Remix has Ms. Titan, the leader of a resurgent Black Satan.
• Kamen Rider Geats has a lot of twists and turns as to who this is, until it's revealed to be Suel, who created the Desire Grand Prix and Jyamato and caused the disappearance of Ace's mom.
  • Kamen Rider Geats: 4 Aces and the Black Fox has Mela, a criminal from the future who is the mastermind behind the "World Doomsday Game".
  • Kamen Rider PunkJack has Kazuki Mashima, who is trying to get his wish of taking over the world granted.
  • Kamen Rider Tycoon meets Kamen Rider Shinobi has Amakusa Shiro Tokisada, the new leader of the Niji no Hebi who is trying to obtain the power of every ninja Kamen Rider.
  • Kamen Rider Gazer] has Nemeru/Kamen Rider Gazer Zero, who is trying to bring about the Jyamato god of destruction.
  • Kamen Rider Geats: Jyamato Awaking has an Big Bad Ensemble between Future!Ace and Aoto/King Jyamato.

Crossover Films

• Movie War 2010 has Dai-Shocker resurrected as Super Shocker, led by Eijiro Hikari/Dr. Shinigami and Narutaki/Colonel Zol, who are in turn usurped by the Neo Organism. Again.
  • Double's portion of Movie War 2010 has the Dummy Dopant, who combines with the aforementioned Neo Organism to become Ultimate D, bringing Decade and Double together.
• Movie War Core: Kamen Rider Core, an energy Rider seeking to rule the world serves as the climax villain of the film although Giru the Dinosaur Greeed made his presence known and the OOO portion of the film had Nobunga as the main menace to the heroes.
• Fitting for a milestone celebration, OOO, Den-O, All Riders: Let's Go Kamen Riders has Shocker which, thanks to a change in history, succeeded in defeating the Kamen Riders and taking over the world. By the present day, they've grown into a Legion of Doom comprising all the villains in the Kamen Rider franchise up until that point.
• Kamen Rider X Kamen Rider Fourze And OOO Movie War Megamax: Lem Kannagi/Super Galaxy King, a Foundation X researcher seeking to become ruler of the world. Meanwhile Poseidon, a nefarious Rider from the future, serves as the villain of the OOO portion.
• Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum has The Akumaizer, a group of demons heading an army of revived monsters to invade the world, though the Fourze portion has Hercules Zodiarts.
• Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle: Kamen Rider Bujin Gaim, a Rider from the Warring Period World seeking to conquer it, serves as this for most of the movie.
  • The Wizard portion has the standalone Ogre Phantom, who seeks to devour all other Phantoms in the world to become the most powerful and creates an Evil Knockoff of Koyomi to mess with Haruto.
• Kamen Rider × Kamen Rider Drive & Gaim: Movie War Full Throttle: Megahex, a cybernetic Hive Mind seeking to assimilate all life into itself. The Drive portion has Zoruko Tojo/Kamen Rider Lupin for it, though after he's dealt with his robotic gets absorbed into Megahex and Megahex takes the spot again.
• Kamen Rider × Kamen Rider Ghost & Drive: Super Movie War Genesis has the Da Vinci Gamma.
• Kamen Rider Heisei Generations: Dr. Pac-Man vs. Ex-Aid & Ghost with Legendary Riders has Dr. Pac-Man/Michihiko Zaizen who also counts as a Greater-Scope Villain for Ex-Aid itself, revealing that his team was behind the creation of game disease and had a crucial role in the emergence of the Bugster virus, namely in surgically extracting Parado from Emu's body, bringing about the original Bugster virus that all other strains of game disease descend from.
• Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders has the Big Bad Duumvirate of Kaisei Mogami from the Alternate Universe where Build takes place and his Alternate Self from the prime Kamen Rider reality, who is also a powermad member of Foundation X like Lem Kannagi before him. The two incarnations of Mogami transform into Kaiser and Kaiser Reverse respectively, then merge into Bikaiser.
• Kamen Rider Heisei Generations Forever has the Time Jacker Tid, who's out to erase the history of the Heisei Kamen Riders.
• Kamen Rider: Reiwa the First Generation has the Time Jacker Finis, who caused the Bad Future of the film by creating Another Zero-One, all to distract Sougo and the gang from her true goal of obtaining the powers of the first Kamen Rider.
• Kamen Rider Saber + Kikai Sentai Zenkaiger Super Hero Senki has Asmodeus, the "ultimate entity" who was previously sealed away in Saber's world by the Sword of Logos.
• Kamen Rider: Beyond Generations has Diablo, a "Devil of Mystery" connected with Giff who is responsible for the Bad Future of 2071.
• Kamen Rider Geats × Kamen Rider Revice: Movie Battle Royale has Colus the first Game Master of the Desire Grand Prix who transforms it into the Desire Royale.

Super Hero Taisen

• Kamen Rider × Super Sentai: Super Hero Taisen has a Big Bad Ensemble between Tsukasa Kadoya, leading a resurgent Dai-Shocker, and Emperor (formerly Captain) Marvelous leading the Dai-Zangyack alliance of resurrected Super Sentai villains, both of whom are looking to eliminate the heroes of each other's respective franchises. However, in the end it turns out both were being used by Narutaki/the fake Doktor G and 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, who commandeers the Big Machine all because Tsukasa's deception pissed him off.
• Super Hero Taisen Z has Shadow Moon, leader of Space Shocker, in a Big Bad Duumvirate with Strategist Reider of the Space Crime Syndicate Madou to revive the latter's master, Demon King Psycho.
• Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai sees the return of the Badan Empire and its Generalissimo, having reformed Badan into a Legion of Doom of undead villains.
• Super Hero Taisen GP: Kamen Rider #3 has the Great Leader, who has yet again used Time Travel to achieve world domination for Shocker, after first making his return known in Ninninger vs. Drive.
• Kamen Rider × Super Sentai: Chou Super Hero Taisen has a Big Bad Duumvirate of Eight Kirino and Another Hiiro Kagami, who are usurped in the climax by the return of Shocker now led by Shocker Leader III.

Spin-offs

• Kamen Rider SD, a comedic Continuity Reboot minifranchise, has the Great Leader back, now as the master of Gran Shocker, an alliance of villains up to Black RX.
• Kamen Rider: The First, a Continuity Reboot film, has Shocker led by the Elderly Gentleman, actually Doctor Shinigami, a Dragon from the original series. The sequel Kamen Rider: The Next, which adds V3 to the mix while keeping the bad guys as Shocker, brings back the Great Leader.
• The Affectionate Parody Kamen Rider G has Daido Oda (Phylloxera Worm), field leader of the terrorist organization Shade working to get their true leader Seizan Tokugawa busted out of prison.
• The Alternate Continuity Kamen Rider Amazons has a Big Bad Ensemble: the scattered Amazons are the main threat and largely operate on their own, though some of the more powerful Amazons (like the Bat or Ant Queen) are able to command weaker members of their kind. On the other side, the Nozama Pharmacy (specifically their chairman, Takaaki Tenjo) are responsible for creating them in the first place and are willing to let people die brutal, gory deaths and keep the four thousand maneating monsters roaming the countryside secret just to keep the Amazon Cells to themselves. To top it all off, Tenjo released the Amazons in the first place to cause this whole mess. Season 2 is a bit more complicated as Mamoru and his group started the new outbreak, Jin is constantly hunting down Chihiro with intent to kill him, and Nanaha (now an Amazon) is rampaging about and becomes Jin's Final Boss. Though Tenjo could still be considered the overall Big Bad, seeing as every single thing that happens in both seasons was because of him releasing the Amazons in the first place. The Grand Finale movie Kamen Rider Amazons: The Last Judgement' has Einosuke Mido/Kamen Rider Amazon Neo Alpha.

Web Miniseries

• Carrying on from where Super Hero Taisen GP left off, Kamen Rider 4 has the Great Leader, once again trying to use Time Travel to restore Shocker.
• Kamen Sentai Gorider has Kuroto Dan, who masterminded the events of the miniseries as a means to revive himself and was incognito as Kazuma Kenzaki all along.
• Kamen Rider Genms ~The Presidents~ has Kuroto Dan and Masamune Dan. The beginning however reveals that the Ark is still active and The Man Behind the Man, as it was the one responsible for Gai getting infected by Kuroto's Bugster virus strand.
• Kamen Rider Saber × Ghost and Kamen Rider Specter × Blades have a trio of Danton's former followers, who create clones of Kanon for a mysterious purpose and later end up allying with Desast by chance.
• Kamen Rider Outsiders has a Big Bad Ensemble between Zein, an AI that seeks to subjugate mankind because of their capacity for evil, and Foundation X, who form the titular Villain Protagonist team to combat Zein.

Adaptations

• Masked Rider, adapted from Black RX, has Count Dregon (General Jark) as Big Bad and rival to Lord Zedd, while the Crisis Emperor is Demoted to Extra as Lavasect, a Monster of the Week.
• Kamen Rider Dragon Knight, adapted from Ryuki, had General Xaviax.