Story :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.
Cast
Masahiro InoueTsukasa Kadoya / Kamen Rider Decade
Ryouta MuraiYusuke Onodera / Kamen Rider Kuuga
Kanna MoriNatsumi Hikari
Kimito TotaniDaiki Kaito / Kamen Rider Diend
Renji IshibashiEijiro Hikari / Doctor Shinigami
Tatsuhito OkudaNarutaki
Moe AraiSayo Kadoya
Ryuichi OhuraNobuhiko Tsukikage / Shadow Moon
GacktJôji Yûki
Tetsuo KurataKotaro Minami / Kamen Rider Black / Kamen Rider Black RX
Toshiki KashûShouichi Tsugami / Kamen Rider Agito
Riku IchikawaYoung Tsukasa Kadoya
Momoka IshiiYoung Sayo Kadoya
Ren OsugiAmbassador Hell
Seizô KatôGeneral Jark (voice)
Tetsu InadaKamen Rider 1 (voice)
Takahiro FujimotoKamen Rider 2 (voice)
Hirofumi TanakaKamen Rider V3 (voice)
Kenichi SuzumuraKamen Rider X (voice), Garagaranda (voice)