Goku is a saiyan from the earlier destroyed planet vegeta. His best friend is another saiyan from planet vegeta named Vegeta, he calls himself the prince of saiyans... The saiyan race is a race that is skilled in fighting... The saiyans greatest enemy is Frieza, a lizard type alien that is extremely powerful... He is the one who destroyed planet vegeta... Goku and Vegeta now live on earth with some other friends including Krillin, Yamcha, Tien, and Piccolo... Goku and Vegeta have sons