Boo

Boo is the creation of Babi De's father. He has been emprisoned in a shell for many years by the great Kaios. The first form of Boo is a very fat pink weird looking creature. However his powers are great and he can change anyone into candies and chocolate with his will. When Gohan tries to fight with him Boo defeats him and make him unconsiuous for some time. Later on when Mr Satan tried to destroy Boo he finally turned out to become friends with him. But because of this friendship Boo transformed into Majin Boo for he grew very fond of Mr. Satan and a puppy. When they almost died the Fat Boo let the Evil Boo who was inside of him get out and so two Boos appeared. Majin Boo ate Fat Boo and became stonger. Vegeta also tried to kill Boo but seeing that he couldn't he sacrificed himself and died. Later on Goten and Trunks fused together to become Gotenks. Under this form they could fight with Boo easily and they almost killed him but in the end they were absorbed by Boo. After absorbing his prays Boo transformed himself and becomes stronger. Thus after absorbing Gotenks and Piccolo Boo became incredibly strong. Gohan who was brought to the Great Kaio's palace to train became stronger but once again that wasn't enough and he was absorbed by Boo allowing him to become once again stonger. Goku and Vegeta then fused together and saved their friends from inside Boo's body changing his apparence once again and letting him become nothing but the Evil Boo he was before becoming Fat Boo. Goku tried to fight Boo while being under the Super Sayajin 3 form but couldn't and was rapidly weakened. He then did a humongous Genki Dama which killed Boo and it was the end of him. However after Goku's wish Boo reincarnated into the body of a pure hearted young man named Oob which had the same faculties and powers has the Evil Boo.