Kinnikuman throws you into a tournament where the rules are negotiable, the wrestlers are literal monsters, and winning means nothing if you lose your sense of humor doing it. The movie treats absurdity as the highest form of sincerity: a championship belt stolen by an Octopus Dragon is not a setup for irony, it is the entire point. You watch because the show knows the only thing cooler than a perfect wrestler is a wrestler who makes you laugh while destroying someone twice his size.
Kinnikuman's prized championship belt vanishes into the hands of the Octopus Dragon, a villain with ambitions as massive as his ego. To reclaim what was stolen and protect Mari's honor, Kinnikuman rallies his fellow Justice Choujins for an expedition to the distant Planet Metro. What awaits them isn't a simple heist but a brutal tournament where the strongest wrestlers in the universe clash for supremacy. The atmosphere crackles with the kind of over-the-top energy that defines 1980s action comedy. Every match pushes the absurdity dial higher: opponents with ridiculous gimmicks, finishing moves that bend the laws of physics, and stakes that somehow feel both deadly serious and completely ridiculous in the same breath. The comedy lands in the gaps between spectacular carnage, where Kinnikuman's determination bumps up against his fundamental goofiness.