 This article is about a recurring plot element in the Kamen Rider Series.
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Crossover Forms are Rider Forms assumed by Kamen Riders that feature elements outside of the Riders' native series. Most of these forms utilize the powers of another Rider, either the protagonist's immediate predecessor or successor. In some other cases, the form is the power of a Rider who is not the immediate predecessor or successor. These forms, like Hyper Battle forms, are usually used only once or twice and are never mentioned or used in series canon again.
The real world purpose of these forms are threefold: to advertise the Legend Rider toy devices that Bandai sells annually, a special addition to the Riders power's for the Movie War films to add to the excitement for moviegoers and the forms acting as playable form change power ups for the Ganbarizing game.
Kamen Rider Decade
- Decade is able to assume the form of various past Kamen Riders, for a full list see Kamen Rides. Both Decade and Diend's Complete Forms allow them to use the powers of past Riders as well.
Kamen Rider OOO
- Kamen Rider OOO
- Tamashii Combo (OOO, Den-O, All Riders: Let's Go Kamen Riders) *erased from existence due to restoration of original timeline.
OOO Tamashii Combo
Kamen Rider Gaim
- Kamen Rider Gaim
- Wizard Arms (Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle)
- 1 Arms (Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai)
- Drive Arms (Kamen Rider × Kamen Rider Drive & Gaim: Movie War Full Throttle)
- Ryuki Arms (Kamen Rider Battle: Ganbarizing)
- Den-O Arms (Kamen Rider Battle: Ganbarizing)
- Decade Arms (Kamen Rider Battle: Ganbarizing)
- Double Arms (Kamen Rider Battle: Ganbarizing)
- OOO Arms (Kamen Rider Battle: Ganbarizing)
- Fourze Arms (Kamen Rider Battle: Ganbarizing)
Gaim Wizard Arms
Gaim 1 Arms
Gaim Drive Arms
Gaim Ryuki Arms
Gaim Den-O Arms
Gaim Decade Arms
Gaim Double Arms
Gaim OOO Arms
Gaim Fourze Arms
- Kamen Rider Baron
- OOO Arms (Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle)
- Den-O Arms (Kamen Rider Battle: Ganbarizing)
- Wizard Arms (Kamen Rider Battle: Ganbarizing)
- Kamen Rider Ryugen
- Double Arms (Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle)
- Faiz Arms (Kamen Rider Battle: Ganbarizing)
- Fourze Arms (Kamen Rider Battle: Ganbarizing)
- Kamen Rider Zangetsu
- Fourze Arms (Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle)
- Kabuto Arms (Kamen Rider Battle: Ganbarizing)
- Decade Arms (Kamen Rider Battle: Ganbarizing)
Zangetsu Fourze Arms
Zangetsu Kabuto Arms
Zangetsu Decade Arms
- Kamen Rider Fifteen (Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai)
- Decade Arms
- Fourze Arms
- Wizard Arms
- Gaim Arms
Fifteen Decade Arms
Fifteen Fourze Arms
Fifteen Wizard Arms
Fifteen Gaim Arms
Kamen Rider Drive
Drive Type Fruits
Kamen Rider Ghost
- Kamen Rider Ghost
- Drive Damashii (Kamen Rider Ghost: Legendary! Riders' Souls!, Kamen Rider 1)
- Gaim Damashii (Kamen Rider Ghost: Legendary! Riders' Souls!, Kamen Rider 1)
- Wizard Damashii (Kamen Rider Ghost: Legendary! Riders' Souls!, Kamen Rider 1)
- Ichigou Damashii (Kamen Rider Ghost: Legendary! Riders' Souls!)
- Heisei Damashii (Kamen Rider Ghost: Legendary! Riders' Souls!)
- Ex-Aid Damashii ((Kamen Rider Heisei Generations: Dr. Pac-Man vs. Ex-Aid & Ghost with Legend Rider)
- Kuuga Damashii (Kamen Rider Battle: Ganbarizing)
- Ryuki Damashii (Kamen Rider Battle: Ganbarizing)
- Hibiki Damashii (Kamen Rider Battle: Ganbarizing)
- Den-O Damashii (Kamen Rider Battle: Ganbarizing)
- Agito Damashii (Kamen Rider Battle: Ganbarizing)
- Faiz Damashii (Kamen Rider Battle: Ganbarizing)
- Blade Damashii (Kamen Rider Battle: Ganbarizing)
- Kabuto Damashii (Kamen Rider Battle: Ganbarizing)
- Kiva Damashii (Kamen Rider Battle: Ganbarizing)
- Decade Damashii (Kamen Rider Battle: Ganbarizing)
- W Damashii (Kamen Rider Battle: Ganbarizing)
- OOO Damashii (Kamen Rider Battle: Ganbarizing)
- Fourze Damashii (Kamen Rider Battle: Ganbarizing)
Ghost Drive Damashii
Ghost Gaim Damashii
Ghost Wizard Damashii
Ghost Ichigou Damashii
Ghost Heisei Damashii
Ghost Ex-Aid Damashii
Ghost Kuuga Damashii
Ghost Ryuki Damashii
Ghost Hibiki Damashii
Ghost Den-O Damashii
Ghost Agi Damashii
Ghost Faiz Damashii
Ghost Blade Damashii
Ghost Kabuto Damashii
Ghost Kiva Damashii
Ghost Dec Damashii
Ghost W Damashii
Ghost OOO Damashii
Ghost Fourze Damashii
- Kamen Rider Specter
- W Damashii (Kamen Rider Ghost: Legendary! Riders' Souls!, Kamen Rider 1)
- Fourze Damashii (Kamen Rider Ghost: Legendary! Riders' Souls!, Kamen Rider 1)
- OOO Damashii (Kamen Rider Ghost: Legendary! Riders' Souls!, Kamen Rider 1)
- Agito Damashii (Kamen Rider Battle: Ganbarizing)
- Decade Damashii (Kamen Rider Battle: Ganbarizing)
- Kuuga Damashii (Kamen Rider Battle: Ganbarizing)
- Ryuki Damashii (Kamen Rider Battle: Ganbarizing)
- Faiz Damashii (Kamen Rider Battle: Ganbarizing)
- Blade Damashii (Kamen Rider Battle: Ganbarizing)
- Hibiki Damashii (Kamen Rider Battle: Ganbarizing)
- Kabuto Damashii (Kamen Rider Battle: Ganbarizing)
- Den-O Damashii (Kamen Rider Battle: Ganbarizing)
- Kiva Damashii (Kamen Rider Battle: Ganbarizing)
- Wizard Damashii (Kamen Rider Battle: Ganbarizing)
- Gaim Damashii (Kamen Rider Battle: Ganbarizing)
- Drive Damashii (Kamen Rider Battle: Ganbarizing)
- Ichigou Damashii (Kamen Rider Battle: Ganbarizing)
Specter W Damashii
Specter Fourze Damashii
Specter OOO Damashii
Specter Agito Damashii
Specter Decade Damashii
Specter Kuuga Damashii
Specter Ryuki Damashii
Specter Faiz Damashii
Specter Blade Damashii
Specter Hibiki Damashii
Specter Kabuto Damashii
Specter Den-O Damashii
Specter Kiva Damashii
Specter Wizard Damashii
Specter Gaim Damashii
Specter Drive Damashii
Specter Ichigou Damashii
- Kamen Rider Necrom
- Faiz Damashii (Kamen Rider Battle: Ganbarizing)
- Blade Damashii (Kamen Rider Battle: Ganbarizing)
- Kabuto Damashii (Kamen Rider Battle: Ganbarizing)
- Kiva Damashii (Kamen Rider Battle: Ganbarizing)
- Kuuga Damashii (Kamen Rider Battle: Ganbarizing)
- Agito Damashii (Kamen Rider Battle: Ganbarizing)
- Ryuki Damashii (Kamen Rider Battle: Ganbarizing)
- Hibiki Damashii (Kamen Rider Battle: Ganbarizing)
- Den-O Damashii (Kamen Rider Battle: Ganbarizing)
- Decade Damashii (Kamen Rider Battle: Ganbarizing)
- W Damashii (Kamen Rider Battle: Ganbarizing)
- OOO Damashii (Kamen Rider Battle: Ganbarizing)
- Fourze Damashii (Kamen Rider Battle: Ganbarizing)
- Wizard Damashii (Kamen Rider Battle: Ganbarizing)
- Gaim Damashii (Kamen Rider Battle: Ganbarizing)
- Drive Damashii (Kamen Rider Battle: Ganbarizing)
- Ichigou Damashii (Kamen Rider Battle: Ganbarizing)
Necrom Faiz Damashii
Necrom Blade Damashii
Necrom Kabuto Damashii
Necrom Kiva Damashii
Necrom Kuuga Damashii
Necrom Agito Damashii
Necrom Ryuki Damashii
Necrom Hibiki Damashii
Necrom Den-O Damashii
Necrom Decade Damashii
Necrom W Damashii
Necrom OOO Damashii
Necrom Fourze Damashii
Necrom Wizard Damashii
Necrom Gaim Damashii
Necrom Drive Damashii
Necrom Ichigou Damashii
Kamen Rider Ex-Aid
- Kamen Rider Ex-Aid
- Ghost Gamer (Kamen Rider Heisei Generations: Dr. Pac-Man vs. Ex-Aid & Ghost with Legend Rider, Kamen Rider Ex-Aid "Tricks": Kamen Rider Genm "Legend Rider Stage")
- Drive Gamer (Kamen Rider Ex-Aid "Tricks": Kamen Rider Genm "Legend Rider Stage")
- Gaim Gamer (Kamen Rider Ex-Aid "Tricks": Kamen Rider Genm "Legend Rider Stage")
- Ichigou Gamer (Kamen Rider Battle: Ganbarizing)
- Kuuga Gamer (Kamen Rider Battle: Ganbarizing)
- Ryuki Gamer (Kamen Rider Battle: Ganbarizing)
- Kabuto Gamer (Kamen Rider Battle: Ganbarizing)
- Kiva Gamer (Kamen Rider Battle: Ganbarizing)
- Decade Gamer (Kamen Rider Battle: Ganbarizing)
- Double Gamer (Kamen Rider Battle: Ganbarizing)
Ex-Aid Ghost Gamer Level 1
Ex-Aid Ghost Gamer Level 2
Ex-Aid Drive Gamer Level 2
Ex-Aid Gaim Gamer Level 2
Ex-Aid Ichigou Gamer Level 2
Ex-Aid Kuuga Gamer Level 2
Ex-Aid Ryuki Gamer Level 2
Ex-Aid Kabuto Gamer Level 2
Ex-Aid Kiva Gamer Level 2
Ex-Aid Decade Gamer Level 2
Ex-Aid Double Gamer Level 2
- Kamen Rider Genm
- Wizard Gamer (Kamen Rider Ex-Aid "Tricks": Kamen Rider Genm "Legend Rider Stage")
- Agito Gamer (Kamen Rider Battle: Ganbarizing)
- Faiz Gamer (Kamen Rider Battle: Ganbarizing)
- Blade Gamer (Kamen Rider Battle: Ganbarizing)
- Hibiki Gamer (Kamen Rider Battle: Ganbarizing)
- Den-O Gamer (Kamen Rider Battle: Ganbarizing)
- Decade Gamer (Kamen Rider Battle: Ganbarizing)
- OOO Gamer (Kamen Rider Battle: Ganbarizing)
- Fourze Gamer (Kamen Rider Battle: Ganbarizing)
Genm Wizard Gamer Level 1
Genm Wizard Gamer Level 2
Genm Agito Gamer Level 2
Genm Faiz Gamer Level 2
Genm Blade Gamer Level 2
Genm Hibiki Gamer Level 2
Genm Den-O Gamer Level 2
Genm Decade Gamer Level 2
Genm OOO Gamer Level 2
Genm Fourze Gamer Level 2
Notes
The first concept of Kamen Riders' Crossover Form might be started from a concept art for the unmade sequel of Kamen Rider ZO in the year 1994. In this concept art, Masaru Aso/Kamen Rider ZO utilize the powers of the 7 Senior Rider (せんぱいライダー, Senpai Raidā) by remodeling his body parts.
- Kamen Rider V3: Equipped a radar on ZO's left hand
- Riderman: Equipped a weapon on ZO's right hand.
- X: Equipped two flippers on ZO's feet.
- Amazon: Upgrated ZO's teeth and bite ability.
- Stronger: Equipped a dynamo on ZO's shoulder.
- Skyrider: Equipped two wings on ZO's back.
- Super-1: Equipped a rocket on ZO's waist.