In some rare cases, a Kamen Rider is part of the same species/organization that the antagonists are from. These Kamen Riders all possess monster forms separate from their Rider powers and equipment and their affiliation can be either good or evil.
In a few minor cases, the form in question is only temporary and they can have their humanity restored or at the very least regain control of their human nature and transform back into their original persona again.
Showa[]
Kamen Rider[]
- Kamen Rider 1
- Grasshopper Man #1 (novel-exclusive)
Kamen Rider Black[]
Heisei[]
Kamen Rider 555[]
- Kamen Rider Faiz
- Wolf Orphnoch
- Gallop Mode
- Horse Orphnoch
- Gallop Mode
- Raging Mode
- Cactus Orphnoch
- Snake Orphnoch
- Centipede Orphnoch
- Wolf Orphnoch
- Kamen Rider Kaixa
- Lobster Orphnoch
- Horse Orphnoch
- Gallop Mode
- Raging Mode
- Clione Orphnoch
- Kamen Rider Delta
- Dragon Orphnoch
- Demon-Human Mode
- Dragon-Human Mode
- Rose Orphnoch
- Wolf Orphnoch
- Mosquito Orphnoch
- Dragon Orphnoch
- Kamen Rider Psyga
- Lion Orphnoch (S.I.C. Hero Saga)
- Kamen Rider Orga
- Horse Orphnoch
- Raging Mode
- Raging Gallop Mode
- Horse Orphnoch
- Riotrooper
- Snake Orphnoch
- Mole Orphnoch
- Moose Orphnoch
- Lion Orphnoch
- Rose Orphnoch (S.I.C. Hero Saga)
Kamen Rider Blade[]
- Kamen Rider Blade
- Joker Undead (S.I.C. Hero Saga)
Kamen Rider Kabuto[]
- Kamen Rider Dark Kabuto
- Native Worm
Kamen Rider Den-O[]
- Kamen Rider Nega-Den-O
- Negataros
Kamen Rider Kiva[]
- Kamen Rider Kiva
- Flight Style
- Bat Fangire (Novel-exclusive)
Kamen Rider Decade[]
- Kamen Rider Faiz
- Wolf Orphnoch
Kamen Rider W[]
Kamen Rider OOO[]
- Kamen Rider OOO
- Eiji Greeed
- King Greeed (Stageshow-exclusive)
Kamen Rider Wizard[]
- Kamen Rider Wizard
- All Dragon (S.I.C. Version)
- Kamen Rider Sorcerer
- Drake
Kamen Rider Gaim[]
- Kamen Rider Baron
- Lord Baron
- Kamen Rider Bujin Gaim
- Rengeza Bujin Gaim
- Kamen Rider Tyrant
- Tyrant
- Kamen Rider Mars
- Fire Horse
- Kamen Rider Zangetsu
- Masahito Shizumiya (Over Lord Inves) (Stageshow-exclusive)
Kamen Rider Drive[]
- Kamen Rider Protodrive/Chaser
- Protozero
- Kamen Rider Heart
- Proto Body
- Heart Roidmude
- Evolved Heart Roidmude
- Kamen Rider Brain (Dream only)
- Plain Roidmude 003
- Brain Roidmude
- Evolved Brain Roidmude
- Fake Drive
- Roidmude 027
- Kamen Rider Dark Drive
- Roidmude 108
- Paradox Roidmude
Kamen Rider Ghost[]
Kamen Rider Ex-Aid[]
- Kamen Rider Genm
- Bugster Virus
- Kamen Rider Lazer
- Bugster Virus
Kamen Rider Build[]
- Kamen Rider Evol
- Phantom State
- Ultimate State
- Ultimate Form (Stageshow-exclusive)
- Kamen Rider Metal Build
- Zebra Lost Smash
Kamen Rider Zi-O[]
- Kamen Rider Shinobi
- Another Shinobi
- Kamen Rider Ryuga
- Another Ryuga
Reiwa[]
Kamen Rider Zero-One[]
- Kamen Rider Valkyrie
- Fighting Jackal Raider
- Kamen Rider Ark-Zero (stageshow only)
- Dodo Magia
- Dodo Magia Custom
- Dodo Magia Custom Two
Kamen Rider Saber[]
- Kamen Rider Falchion
- Desast
- Kamen Rider Storious
- Storious (Megid Form)
- Kamen Rider Desast
- Desast (Megid Form)
Kamen Rider Revice[]
- Kamen Rider Vice
- Demon Vice
- Kamen Rider Demons
- Daiouika Deadman
- Anomalocaris Deadman
- Kamen Rider Aguilera
- Queen Bee Deadman
- Kamen Rider Over Demons
- Wolf Deadman
- Wolf Deadman Riot
- Kamen Rider Vail
- Demon Vail
- Kamen Rider Chimera
- Strange Demon
- Kamen Rider Get Over Demons
- Wolf Deadman
- Wolf Deadman Riot
- Kamen Rider Orteca
- Daiouika Deadman
- Anomalocaris Deadman
Kamen Rider Geats[]
- Kamen Rider Nadge-Sparrow
- Marrella Jyamato
- Kamen Rider Hakubi
- Pawn Jyamato
- Kamen Rider Beroba
- Premium Beroba
- Kamen Rider Kekera
- Premium Kekera
- Kamen Rider Glare2
- Premium Beroba
- Kamen Rider Gazer
- Clover Jyamato (Stageshow-exclusive)
Kamen Rider Gotchard[]
- Kamen Rider Valvarad
- Wheel Malgam
- Kamen Rider Dread
- Ants Malgam (Queen)
- Clover Malgam
- Clover Malgam Bamboo Mixtus
- Orochi Malgam
- Mantis Malgam
- Mantis Malgam (Au)
- Mantis Malgam Saber Tiger Mixtus
- Kamen Rider Ark-One
- Ark-One Malgam 4type Mixtus
Other[]
Kamen Rider Amazons[]
- Kamen Rider Amazon Alpha
- Piranha Amazon
- Kamen Rider Amazon Sigma
- Amazon Origin
- Kamen Rider Amazon Neo
- Amazon Origin
Kamen Rider Black Sun[]
- Kamen Rider Black Sun
- Black Locust Kaijin
- New Creation King
- Kamen Rider Shadowmoon
- Silver Locust Kaijin
Adaptation[]
Kamen Rider: Dragon Knight[]
- Advent Master/Kamen Rider Wrath
- Karshian Armor
Notes[]
- Technically, some of the Riders' basic forms are a monster form.
- Double Riders: Grasshopper Man (Shocker)
- Kamen Rider Stronger: Electric Human Stronger (Black Satan)
- Kamen Rider ZX: Perfect Cyborg (Badan Empire)
- Kamen Rider Shin: Cyborg Soldier Level 3 (Institute of Super Science)
- Another Riders
- Additionally, the original Kamen Rider Amazon has been noted to have a monstrous appearance. This is acknowledged in-universe by Yusuke Onodera's remark that the A.R. Amazon appears more like a monster than a Rider in episode 28 of Kamen Rider Decade.