Kinnikuman: Seigi Choujin vs. Senshi Choujin  

Iron Mask has abducted Meat-kun, and in order to rescue him, the treasure of Inmora Island must be obtained. This treasure is concealed within the Seven Story Tower, which is heavily guarded by the ruthless Senshi Choujins. Despite Kinnikuman's request for assistance from Terryman and the Seigi Choujins, they all decline. Undeterred, Kinnikuman embarks on a perilous journey to Inmora Island to confront the Senshi Chōjin and is quickly overwhelmed by their sheer numbers.

Seigi Choujin vs. Senshi Choujinis the seventh and final theatrical film based on the anime series Kinnikuman. It was released in Japan on December 20, 1986 alongside GeGeGe no Kitarou: Crash!! The Great Rebellion of the Multi-Dimensional Youkai and Dragon Ball: The Legend of Shen Long.This movie was loosely based on Yudetamagos manga, Death Game, which itself was based on the Bruce Lee movie, Game of Death.The character Neptuneman appeared in the original manga and anime as the main antagonist of the Dream Choujin Tag Arc. Seiyu Chikao Otsuka returns as one of the main antagonists of this film, having previously played that role in The Stolen Championship Belt.(Source: Kinnikuman Wiki)