Rider Fight

The is a great battle in the Mirror World where 13 Riders are to do battle with each other until only one of them survives. The victor in this grand Battle Royale will be granted his/her wish.
The battle itself was discovered and used by Yui Kanzaki's older brother, Shiro Kanzaki. Although the victor is awarded the wish, Shiro manipulated the war for his own. In actuality, Shiro plans to become the victor so that he could wish for Yui's well-being.
He constantly intervenes with the fights through his puppet Rider, Kamen Rider Odin, so that he can gain the upper hand. Although the power of his puppet was said to surpass the others, Ryuki and Knight have always miraculously overpowered them.
Despite countless attempts at manipulating the results of the war by Shiro to ensure victory for Odin, ultimately Knight stands as the last survivor and winner of Rider Fight, last beating Odin after Odin fades away thanks to Yui successfully convincing Shiro to stop the destructive course of his actions.
==World of Ryuki==
In the alternate reality World of Ryuki, instead of the Rider War, there is the , a battle where the Kamen Riders fight each other within the Mirror World alongside their Contract Monsters in order for the victor to decide the fate of a defendant in a criminal case. Though no harm occurs to the Rider while in the Mirror World, a battle in the real world can be fatal and use of Vent cards outside a battle is forbidden.
==Kamen Rider Zi-O==
16 years later, a woman named Sara had her mirror counterpart announce the Rider Fight once more, in order to stop her boyfriend from killing people as Another Ryuki. Unlike the previous fight, this Rider Fight is stated to have been limited to seven days. On the fifth day, however, due to Sara's worsening condition, the fight's limit was reduced by one day, resulting in the battle lasting for a total of six days. Ultimately, Shinji Kido becomes the winner of this battle and Sara returns Shinji to the real world with her life as the cost.
==Known Participants==
===Official Participants===
Kamen Rider Ryuki 	Koichi Sakakibara ► Shinji Kido
Kamen Rider Knight 	Ren Akiyama ► Shinji Kido (alternate timeline)
Kamen Rider Scissors	Masashi Sudo ► Ishibashi
Kamen Rider Zolda 	Shuichi Kitaoka ► Goro Yura
Kamen Rider Raia 	Yuichi Saito ► Miyuki Tezuka
Kamen Rider Gai 	Jun Shibaura
Kamen Rider Ouja 	Takeshi Asakura
Kamen Rider Odin 	First Odin ► Second Odin ► Third Odin ► Unnamed man
Kamen Rider Tiger 	Satoru Tojo ► Tozuka
Kamen Rider Imperer 	Mitsuru Sano ► Ishida
Kamen Rider Femme 	Miho Kirishima
Kamen Rider Ryuga 	Mirror Image Shinji
Kamen Rider Verde 	Itsuro Takamizawa ► Kimura
Kamen Rider Abyss 	Unnamed man
===Unofficial Participants===
Alternative Zero	Hideyuki Kagawa
Alternative 	Hajime Nakamura
Category:Kamen Rider Ryuki
Category:Events
Category:Kamen Rider Zi-O