Gokou (Saiyan name: Kakaroto) is the main character of Dragonball, Dragon Ball Z, and Dragon Ball GT. His father Bardock purpose for sending Goku to Earth is to destroy it. He was found in Mount Paozu by Grandpa Gohan and banged his head on a rock as a baby. Like that he lost his memories of his saiyin quest to destroy Earth. Then later, he trained under Master Roshi. Next, he learned under Kaiou. He married Chi-Chi and became the father of Gohan and Goten. Goku is very hardworking person and always wanted new challenges. He was killed fighting Raditz, wished back with the dragonballs, killed again when Cell exploded, and came back to life when Dai-Kaioushin gave up his life so that Gokou could live to fight Boo. Gokou can reach SSJ1, SSJ2, and SSJ3 level. He can also reach Super Gokou 4 level(which is the highest level a saiyin could reach). In the legend, every 1,000 years there will be a very strong saiyin defeating everyone in the universe. Gokou is considered the true Saiyan who appears every 1000 years. He can also fused with Vegeta to become Vegetto and Gogeta! In the Dragon Ball GT episodes he turn into Super Saiyin Level 4 and fused with Vegita(super saiyin level 4 too) and formed Super Gogeta. At the end of Dragonball GT, Gokou rode on Shenlong, fused with the dragonballs, and disappeared.