Dragon Ball GT
Taking place 10 years after the final Dragonball Z story, Pilaf finally manages to get all 7 dragonballs and makes a wish. Unfortunately for Pilaf, he gets flustered by the presence of Goku and wishes for Goku to be a child again so that Pilaf could “teach him a lesson.” Pilaf gets his wish, and Goku is off on an interstellar trip to gather the 7 “Black Star Dragonballs” that can reverse the wish and return him to adulthood.