Jibaku-kun
Story. The story is set in a place called "Parallel Planet", located above the sky and down the sea. This planet is divided into twelve worlds, in the manner of a clock. In the center of this clock is the "Needle Tower", where time does not pass, The World Zero. In each world there is a Great Child, something like the guardian of that world. The Great Child is always accompanied by a spirit, which is an explosive, spherical side-kick that helps defeat the Monster Troublemakers. Baku ("Bucky" in some versions), the protagonist of the story, is  a normal boy that lives in the first world. He lives with a single and "humble" ambition: to dominate the world (the whole planet). He is very confident and would die for his dream. One day he meets with En, the Great Child of Primas (World One). En is known as the strongest Great Child of all of the worlds and he is looking for a successor. After finding Baku and talking a little with him, En chooses him as his successor. Thus Baku becomes a Great Child and acquires Jibaku, the spirit of the first world. From that point  onwards, Baku travels through the twelve worlds to accomplish his dream of dominating the world, with his friends (or, as he calls them, slaves) that he meets in the world. Characters. Great Child. In the English version of the manga and other dubbed versions of the anime, their Japanese names are renamed while others retain their original name.