WMG: Sand Land
Sand Land takes place in the Demon World.Lucifer looks like a generic devil, but he's actually the true ruler of their universe, Dabra. Only his son, Beelzebub, knows it. In fact, Beelzebub and Goku start their adventures at the same time. We just don't find out what happened to Beelzebub, but we do find out what happens to Goku.