Broly

Broly  is the supervillain in the eighth, tenth, and eleventh movies of the series. He is born with a power level of 10,000, a power level greater than most elite Saiyan warriors. He is mentally unstable partially due to the crying of the infant Goku in the incubator next to him when they were born, partially due to threatening events pertaining to his birth date, and partially because of his extreme power level. He eventually becomes the "Legendary Super Saiyan", although 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, destroying the control device and becoming the unstoppable Legendary Super Saiyan. He effortlessly pummels Super Saiyan Goku, Super Saiyan Vegeta, Super Saiyan Gohan, and Super Saiyan Future Trunks, as well as Super Namekian Piccolo, before killing his father. It is well known that his power level increases endlessly while in super saiyan form. He is eventually defeated, but he manages to make his way to an escape pod. He later lands on Earth and goes into a frozen state until the crying of Goten awakens him. He is defeated by Goku, Gohan and Goten, with help from Trunks, though blood samples make their way into the hands of an industrialist, who creates a clone called Bio-Broly. The clone eventually wakes up and becomes mixed with bio-liquid, transforming him into Bio-Broly. He is eventually killed by Goten, Trunks, Krillin, and Android 18. He is voiced by Bin Shimada in the Japanese films, and Vic Mignogna in the English dub. Broly has an unbelievable power and will destroy anything in its path.