
Tsukasa travels to his home world of the World of Decade, where he discovers the origin of his powers and his true heritage as the leader of Dai-Shocker. The film features all ten of the lead Heisei Kamen Riders, as well as all of the Shōwa period Kamen Riders, leading to a total of 25 Riders.

as Tsukasa Kadoya / Kamen Rider Decade

as Yusuke Onodera / Kamen Rider Kuuga

as Natsumi Hikari

as Daiki Kaito / Kamen Rider Diend

as Eijiro Hikari / Doctor Shinigami

as Narutaki

as Sayo Kadoya

as Nobuhiko Tsukikage / Shadow Moon

as Jôji Yûki

as Kotaro Minami / Kamen Rider Black / Kamen Rider Black RX

as Shouichi Tsugami / Kamen Rider Agito

as Young Tsukasa Kadoya

as Young Sayo Kadoya

as Ambassador Hell

as General Jark (voice)

as Kamen Rider 1 (voice)

as Kamen Rider 2 (voice)

as Kamen Rider V3 (voice)

as Kamen Rider X (voice), Garagaranda (voice)

as Kamen Rider Amazon (voice), Ikadevil (voice)

as Kamen Rider Super-1 (voice), Kamen Rider J (voice)

as Momotaros / Kamen Rider Den-O (voice)

as Kamen Rider Ouja (voice)

as Kamen Rider KickHopper (voice)

as Shotaro Hidari / Kamen Rider Double (voice)

as Philip / Kamen Rider Double (voice)

as Kiva-la (voice)

as Kamen Rider ZX (voice)

as Kamen Rider Ixa (voice), Shocker Combatmen (voice)

as Skyrider (voice), Kamen Riders, Dai-Shocker members (voice)

as Kamen Rider Blade (voice), Riders, Dai-Shocker members (voice)

as Tournament Announcer, Decadriver, Diendriver, K-Touch (voice)

as Gaia Memory (voice)

as Other Kamen Riders (voice), Other Dai-Shocker members (voice)

as Other Kamen Riders (voice), Other Dai-Shocker members (voice)

as Other Kamen Riders (voice), Other Dai-Shocker members (voice)
