As the whole world watches the Choujin Rugby game on TV, the "Underground Space Emperor" Hydra King has his Underground Space Supermen kidnap Robin Mask. Their aim is to lure out the Seigi Choujins and then attack them using the Robin Memo, which contains info on all of the Seigi Choujin's weaknesses. Watching on TV all over the world, Kinnikuman and the Seigi Choujins get together and head for Planet Hydra.
Released: Jul 13, 1985
Runtime: 39 minutes
Genre: Animation
Stars: Akira Kamiya, Minori Matsushima, Sanji Hase, Hiromi Tsuru, Chisato Nakajima, Hideyuki Tanaka
Crew: Haruya Yamazaki (Screenplay), Takashi Shimada (Comic Book), Yoshinori Nakai (Comic Book), Shin Kawabe (Original Music Composer), Yasuo Yamayoshi (Director)