In order to save a princess, Mantarou (Kid Muscle) and the gang must find a special ginseng. They are later joined by Kevin Mask. (Source: Wikipedia)
Genres: Action, Comedy, Drama, Romance
Watch Kinnikuman II Sei Muscle: Ninjin Soudatsu sen! Choujin Daisensou online — subbed and dubbed, with automatic AniList / MyAnimeList progress sync.