Broly is a Saiyan from Universe 7 in Dragon Ball and one of the most powerful ones to have ever existed. Born on Planet Vegeta, Broly was exiled due to having too much power right from birth. He has spent most of his life on Planet Vampa and grew stronger there. As a Legendary Super Saiyan, Broly belongs to the group of warriors who come into existence once every millennium.
Source：https://www.cbr.com/characters-stronger-weaker-than-broly-dragon-ball/
