“Goku fights to improve himself and become stronger because it makes him happy. He doesn’t need a number to prove …show more content…
In the beginning of Dragonball Z, Goku was met with his long lost brother, Raditz and was given an ultimatum, to kill 100 earthlings or Goku’s son, Gohan will be killed. Raditz believed he was stronger than Goku and Piccolo, the earth’s greatest fighters. This ultimately caused his defeat, but at the sacrifice of Goku’s life. But through this, Goku, was able to train at the North Kai's planet, thus learning the spirit bomb technique and a new martial art, the kaio ken. Goku then arrived at earth with a heavily increased power level(9000). Vegeta and his companion, Nappa are surprised/scared because Goku was originally a low class warrior with a power level; of 345, but in less than a year, he became stronger than an elite(Nappa) and was able to fight head to head with Vegeta(power level of 18,000), the prince of all saiyans(again because their perception of Goku is that he should’ve stayed at