After meeting Bulma and learning about the mystical Dragon Balls, Goku's life was forever changed and led to him becoming a legendary martial artist who saved the world many times. He transformed into a giant monkey as a child and killed his adoptive grandfather on accident, forcing him to live alone in the wilderness for much of his young life. Son Goku ( more commonly known as just Goku), born with the name Kakarot (カカロット, Kakarotto), is a Saiyan from the Planet Vegeta who was raised on Earth.