Kinnikuman: Kessen! Shichinin no Choujin tai Uchuu Nobushi
Genres: Action, Comedy, Sports
Type: Special, Episodes: 1
Aired: Jul 4, 1984
Studio: Toei Animation
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
A TV Special first aired in 1984. It covers the Planet Rakka story arc and takes place after the 21st Choujin Olympics Arc. A young boy from Planet Rakka named Beansman asks Kinnikuman and the others to help save his planet from the Space Samurais led by Black King. The story was a parody of The Seven Samurai.

(Source: Kinnikuman Wiki)