Ultimate Muscle is a tV series anime that premiered in winter 2002, produced by Toei Animation.

About the production: the story comes from a manga, there are 51 episodes of about 20 minutes and its current status is "finished".

Its main genres are action, comedy, sci-fi and sports, with themes such as Shounen, Wrestling, Martial Arts and Aliens.

On AniList, Ultimate Muscle has an average score of 68%, a good score, and appears on 5,607 users' lists.

The franchise continues in or follows from: Kinnikuman II Sei: ULTIMATE MUSCLE and Kinnikuman: Kinnikusei Oui Soudatsu-hen.

Kid Muscle (or Mantaro for short) is a bumbling, gross, and wimpy sort-of person. Unfortunately, he has been summoned to protect the earth from the evil dMp, a band of cheating wrestlers from outer space. Luckily he's not undertaking this task alone. Kid Muscle must join the Muscle League, a group of wrestlers from outer space who are training themselves so they can defend the earth, and stop the dMp by achieving "Ultimate Muscle", a hidden power that makes Mantaro an almost unbeatable opponent. (Source: Anime News Network)

Official synopsis from AniList.