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

[+]When गोकु got there he was found द्वारा an old man named Gohan. Gohan would try to keep गोकु under control, but he kept getting away. Then, one time गोकु fell of a cliff and hit his head. This made him lose his memory, and then गोकु 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 गोकु everything...

The evil Adam looked on in mild surprise.
The destruction he had caused, its results were far better than he had expected. People were panicking all over the earth. He was successful. He would win. The Z-warriors were helpless. They had little time left to live. He could not imagine how they would stop him.
He gave a big laugh and then took flight to his hideout.
Vegeta and गोकु trained hard between themselves. The other Z-warriors were busy too. But the best thing was about the location of their training.
Clinton X had arranged for a hyperbolic time chamber. This one was very different from Piccolo’s...