Goku (1234)

Goku born Garkit was the son of Barrock and is to be thought of as the greatest Super-Saiyan ever. He was one of the last three full-blooded saiyans (Along with Vegeta and Broly). He was oringaly thought to be Vegeata's brother until it was learned Goku was the son of Barrock. Goku was the first Saiyan to reach Super Saiyan Four and was the first to reach all saiyan forms on Earth.

Pre-DragonballSuper Goku.jpg
Goku was born to a bounty-hunter saiyan, Barrock, who happened to be the first saiyan to reach Super Saiyan Three. He crashed landed on Earth before the Nameks destroided the planet of Saiyans. He was found by a man named Gohan, who always wanted children. He made Goku his "grandson" and trained him to be a warrior. Gohan died mysteriously and sent Goku on a quest to find Gohan's cousin, Master Roshi. When Master Roshi was finnaly found Goku started training with him. Soon after, a boy named Krillin washed up on Master Roshi's shore, he had lost his memory and all he could remember was his name was Krillin and he liked turtles. Goku and Krillin trained with Roshi until Roshi gave him a Four-Star dragonball, thus starting the series, Dragonball.

Dragonball
Goku along with his freind Krillin went after the dragonballs. Soon a girl named Bulma joined them. Later, a girl named Chi-Chi also aided them. An evil force named Piccolo arised, Goku had to stop him. Piccolo killed Master Roshi, sending Goku on a rampage as an oversized ape. Later Piccolo was stoped and Master Roshi was revived by the Dragonballs.

Not very soon after that, Piccolo had divived him self into four persons, Piccolo Jr. (the Power), Drum (The Anger), Flute (the Pain) and Kami (the Wisdom). Goku and his freinds were able to stop Flute and Drum but Kami and Piccolo Jr. formed a new good Piccolo who would join them on their quest.

Dragonball Z
Goku learns that he has a brother named Vegeta, who comes down. He is a Saiyan as well. Goku then Powers up to Super Saiyan and defeats Vegeta.