Y/N'S Bio

A young boy saiyan goes by the name Y/N L/N. he was born on the different planet and raised on earth with Goku and his family. Y/N, Goku and vegeta tried to defeat kid buu but
His regeneration, his power and he cannot be defeated but thanks to y/n who finally defeated kid buu with his new transformation called super sayian 4, and then he powered up to his full power of his super saiyan 4. after the defeat of kid buu, earth is now at peace once again... ... or is it...?