Buu, deprived of absorbed fat, reverts to his original form: Kid Buu (the purest and most destructive). He destroys the Earth (everyone is resurrected by Porunga, except Goku). Goku and Vegeta make one last attempt. Goku launches a Global Spirit Bomb: the humans give their energy, Vegeta restrains Buu (in exchange for his redemption). Goku uses the Spirit Bomb to destroy Kid Buu. 10 years later: a new Tenka'ichi Budōkai tournament. Goku meets Uub (the human reincarnation of Kid Buu) and decides to train him. Goku and Uub fly off on a new journey. THE END.