Gaiden
His Father was a Half Saiyan while his mother was a pure blood Saiyan, making him only a quarter human.
His mother gave birth to him while she was an Oozaru, resulting in him having an extraordinarily high power level(12,000)and a red tail, he learned to turn Super Saiyan when he was 6.
His parents were killed when he was a child by Babidi and Dabura(that's how he achieved Ssj2), and he was later taken in by a an Old Supreme Kai who was extremely adept in combat, and was even a retired general in a civil war among deities.
Gaiden had heard stories of the Son Goku and was inspired by them and even ended up learning the kamehameha and Kaioken at some point.
His current transformations are:
-Super Saiyan
-Super Saiyan 2
-Potential Unleashed/Mystic Form
-Ascended Ssj4(Hair turns golden, the white of the eyes turn black while his pupils turn blue, and his body fur turns grey)
-SsjGod

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