Vegeta is the prince of the Saiyans who grew up following Freeza's orders to conquer
other planets. Vegeta was defeated for the first time by Gokou and retreated
. Then, he allied with the Z warriors in battling Freeza , Vegeta easily gets jealous at other warriors because he
wanted to be the strongest. . In the Cell Series, Vegeta reaches SSJ level for the first time.When Vegeta realized that Gokou is stronger, he officially became one of the good guys. Vegeta can fuses with Gokou to become Gogeta. In Dragonball GT, Baby took over his body and he
became Vegeta-Bebi. Then, he reaches SSJ4 level for the first time, and
fused with Super Gokou 4 to become Gogeta.