BROLLY

Brolly is born with a level of 10,000, a power greater than most elite Saiyan warriors, and he is mentally unsettled as an adult, partially due to the crying of the infant Goku in the incubator next to him when they were born. He eventually becomes the "Legendary Super Saiyan" and his destructive tendencies are quelled by a special control device created by scientists for his father, Paragus. After Paragus lures Vegeta, Goku, and their companions to another planet, Broly recalls Goku and goes into a rage. He is eventually defeated, and manages to make his way into an escape pod. He later lands on Earth and goes into a frozen state until the crying of Goku's son, Goten, awakens him. He is killed by Goku, Gohan and Goten, though blood samples make their way into the hands of an industrialist who creates cloned warriors. The clone eventually awakens and becomes mixed with bio-liquid, transforming him into Bio-Broly. He is eventually killed by Goten, Trunks, and Krillin.

Source: http://en.wikipedia.org/wiki/Broly#Broly