Brolly, he was born on the saiya-jin
homeworld with Goku. Their cribs were placed next to each other. While
born with a power level of 10,000 and Goku had a meager power level of 2. When they were babies Goku managed to make
Brolly sad and cry with Goku's persistent whining that wouldn't stop. This is what drove Brolly's anger towards Goku,
Goten, any other dbz warrior and his love of being evil. Please stop reading here if you do not want to further spoil the
storyline/endings of movies 8,10, and 11.
While Brolly was a baby, King Vegeta learned of this child of Paragus that
was born with amazing power for a child. King
Vegeta had both Paragus and Brolly "thrown away" like trash. When Freeza destroyed the planet, Brolly used his amazing
power to protect both himself and Paragus from the destruction.
During Brolly's childhood Brolly became increasingly difficult to control,
Brolly's power was greater than ever imagined.
Paragus had a scientist from a world he conquered create a devise to control Brolly, similar to a remote control of sorts.
When Paragus essentially had this great power at his control, he created a "New Planet Vegeta" in an attempt to draw the
Saiyan Prince(Vegeta) to the new world where Paragus would have his revenge on King Vegeta by killing his son Vegeta by
either the comet that was heading towards the new planet or by Brolly himself. The plan did not work completely as
planned and Paragus told Vegeta of the Legendary Super Saiya-jin who was near the new world that was destroying entire
galaxies. This is what made Vegeta go to the new world.
The rest of Paragus's plan seemed to be working accordingly, but the arrival
of Goku at the new world shortly after Vegeta
caused problems. Seeing Goku, drove Brolly's anger and eventually Brolly could not be controlled by Paragus 's device and
his plan was revealed to the saiya-jins. Paragus tried to escape from the planet before it's eminent destruction but Brolly
destroyed his space pod, with Paragus in it, killing him.
Through a very long and rigorous fight, Goku did finally defeat Brolly
in movie 8 with the help of the others (Piccolo,
Gohan, Trunks, and Vegeta). Brolly returns in Movie 10, somehow he survived Goku's deathblow and managed to get to
another space pod, this space pod lands on earth. There is another battle, Goten and Gohan use a large Kame-hame-ha to
defeat Brolly. At first there is no effect but Goku's spirit falls from the clouds and gives them emotional support as well as
joining in on the Kame-hame-ha which does destroy Brolly. Finally he returns one last time in movie 11, he is cloned and is
once again destroyed by Chibi (young non-future) Trunks and Goten.