When Goku was just a baby, he was sent from his home pagina planet, Planet Vegeta, where a race of people called Saiyans. Goku was sent to Earth on a mission to kill all life, so the planet can be sold.

[+]When Goku got there he was found door an old man named Gohan. Gohan would try to keep Goku under control, but he kept getting away. Then, one time Goku fell of a cliff and hit his head. This made him lose his memory, and then Goku was like a normal child, exept, for his tail. All Saiyans have tails but, nobody on Earth knew that.

[+]Gohan was a master of the marshil arts, and he taught Goku everything...