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.
DirectorYasuo Yamayoshi
WritersHaruya Yamazaki, Takashi Shimada, Yoshinori Nakai
Part of
Includes: Kinnikuman: The Stolen Championship Belt, Kinnikuman: Great Riot! Justice Chojin, Kinnikuman: Justice Superman vs. Ancient Superman, Kinnikuman: Counterattack! Hidden Space Superman, Kinnikuman: Hour-of-Triumph! Justice Superman, Kinnikuman: New York Close Call!, Justice Supermen vs. Fighter Supermen
