Yuusei Shounen Papii
English title: Prince Planet
Japanese title: 遊星少年パピイ
Alternative titles: Planet Boy Popi, Yuusei Shonen Papi, Yusei Shonen Papii
Type: TV
Source: Original
Episodes: 52
Status: Finished Airing
Aired: Jun 3, 1965 to May 27, 1966
Broadcast: Unknown
Duration: 25 min per ep
Rating: PG - Children
Studios: Eiken
Genres: Action, Sci-Fi
Themes: Space, Super Power

Tells the story of a member of the Universal Peace Corps from the Planet Radion coming to Earth on a mission to determine if this world meets standards for membership in the Galactic Union of Worlds and assist its inhabitants during his stay. While on his mission Prince Planet adopts the identity of an Earth boy named Bobby and gains comrades who work together alongside him combating evil forces both alien and terrestrial. 

(Source: Wikipedia)