Kinnikuman walks in late stuffing his face while his entire team gets obliterated, then has to solo the guy who just absorbed all their powers, and the movie plays this as hilarious before it plays it as heroic. The tournament setup is window dressing; what matters is watching the dumbest, most lovable wrestler in existence realize he's the only one left standing. A 1986 comedy-action film that knows its protagonist's greatest strength is refusing to take himself seriously, even when the odds are impossible.
A prestigious wrestling tournament in New York brings together the Justice Choujins, mighty superhero wrestlers ready to prove their dominance. But before the competition can properly begin, a devastating force arrives: Akuma Shogun, a warrior of unimaginable power who systematically defeats every champion in sight. With each victory, he absorbs their strength, growing exponentially stronger and nearly unstoppable. The Justice Choujins fall one by one, their combined power now locked within their conqueror. Only Kinnikuman remains standing, the accidental survivor who missed the carnage entirely due to a fortunate detour for food. Now the fate of the entire Justice Choujin faction rests on his shoulders. Kinnikuman must confront an opponent wielding the consolidated might of his entire team, a seemingly impossible task that demands everything he has. What unfolds is a brutal clash that determines whether justice in the wrestling world survives or crumbles under overwhelming darkness.