Jibaku-kun
English title: Bucky: The Incredible Kid
Japanese title: ジバクくん
Alternative titles: Jibaku-kun: Twelve World Story, Bucky: Searching for world 0, Bucky
Type: TV
Source: Manga
Episodes: 26
Status: Finished Airing
Aired: Oct 5, 1999 to Mar 28, 2000
Broadcast: Tuesdays at 18:30 (JST)
Duration: 22 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Trans Arts
Producers: TV Tokyo
Licensors: Enoki Films
Genres: Adventure, Comedy, Fantasy

Bucky, the protagonist of the history, is a normal boy that lives in the first world. He lives with a single and humble ambition: to dominate the world (in the sense of the whole planet). He is very certain and he would certainly die to reach his dream. 

One day he meets with Spark, the Great Child of Primas (World One). Spark is known as the strongest Great Child of all of the worlds, and he is a successor's search. After finding Bucky and talk a little with him, Spark without apparent reason choose Bucky his successor. Bucky has just become a Great Child and to win the company of Jibaki, the spirit of the first world.

(Source: Wikipedia)