Kinnikuman II Sei: Muscle Ninjin Soudatsu sen! Choujin Daisensou

A princess can only be saved by a rare “Muscle Ginseng,” sending Mantarou Kinniku and his fellow young Choujin on a frantic hunt for the miraculous root. Their search quickly becomes a contest against other powerful fighters who want the prize for themselves.

Old rivalries and new alliances collide when Kevin Mask enters the struggle, forcing Mantarou to prove that his strength is more than an inheritance from Kinnikuman. With a life depending on them, the young heroes turn a bizarre treasure hunt into another full-scale Choujin battle.