Watch Kinnikuman II Sei: Ultimate Muscle 2 Online

Second season of .

Episode 0 of .

Prince Kinnikuman, who came to Earth from Kinnikusei, a planet at the end of the universe, was always ridiculed by humans as a useless Chojin. However, by chance, he was given the right to participate in the Chojin World Cup, a tournament to determine the world's best Chojin, and by a miracle, he won the championship. The following year, he even won it again! Since then, he has become a central figure among Seigi Chojin who protects the peace of the universe. He has managed to defeat the raging forces of the enemy, including Akuma Chojin who plans to rule the world, and Perfect Chojin who aims to wipe out the weak Chojin on Earth, with the power of friendship with his friends, including Terryman and Robin Mask. In recognition of his achievements, Kinnikuman wins the "Survival Match for the Kinnikusei Throne," the final test of his career, and is crowned the 58th Great King of Kinnikusei! He returned to his home planet from Earth, got married, and said goodbye to eight years of fighting. About a year and a half later, the entire universe was supposed to be at peace...

Mantaro has made it to the semifinal match of the Chojin Cup. He must now fight Ricardo in a soccer field to advance to the last match. Kevin Mask is also in the semifinals, and must defeat Ilioukhine in an aerial field to advance. These three matches will determine who wins the Chojin Cup.

The Chojin Crown, the tournament which Mantaro (Kid Muscle) reluctantly participates in. After going along with the obstacles (most of which were created to try and eliminate him), he qualified.