Dragon Ball and Dragon Ball Z have some memorable and lovable black characters. Yet, the mantle of most memorable black character from the series goes to Uub. First appearing at the end of Dragon Ball Z, Uub is the reincarnation of the evil villain Majin Buu.
After a wish by Goku made to Yama, the death god, Buu is reborn as a human with a good heart. Uub fights and loses against Goku who then promptly takes him on as his student.