Majin Buu is a creation of Babi-di. Completely evil, Buu first appeared as a fat marshmellow type creature. Being thoroughly evil, he killed his creator as androids 17 and 18 did. Majin Buu has the power to eat others and obtain their powers. Also, when Majin Buu eats someone, he more or less takes on their form. Majin Buu is the final and most powerfull villain in the DBZ series. When Buu met Mr. Satan, Mr. Satan brought out the good in Buu. Unforetunatly, the bad side of Buu seperated from good Buu and being much stronger, defeated good Buu and reabsrobed him. After Vegeto is absorbed and picks the others out of Buu, he is still very strong. Buu destroys the earth but the Z fighters use the Dragonballs to wish it back and after fighting Buu some more, defeat Buu.