Goku is the strongest charter in Dragonball Z. He was a bad guy as a kid then he hit his head on a rock and it made him be a good guy. Master Roshie is the person who found Goku and trained him. Goku is the person who defeats Majion Buu. Guko and Vegeta fuse with the kies earrings. they make Vegeto when they are fuse together with the earrings.