Broly (ブロリー)
Background
As great as Broly's power was, his emotional instability was greater. Fearing Broly's state of mind, Paragus had a scientist create a special control device to keep Broly controlled. Successful in controlling him, Paragus planned to have revenge on King Vegeta's son. When Broly encountered Son Goku, Broly became erratic though he was brought back under control by Paragus. Eventually, Broly overpowered the control device, and fully manifested his powers. No longer under the device's control, he unleashed his fury on Goku, Vegeta, Son Gohan, Future Trunks, and Piccolo, and defeated them all. The Z warriors eventually channeled their energy into Goku, who used the energy for one last powerful blow that seemingly killed Broly.
Broly survived and entered a Saiyan Space Pod, coincidentally landing on Earth. The crater caused by his landing filled up with water and froze over time, during which he fell into a deep sleep. During this time, Gohan grew up, Son Goten was born and Goku was in the Afterlife. In an adventure to collect the Dragon Balls, Goten, Trunks, and Gohan find themselves in the mountain range where Broly crashed. Broly awakens and Goten, Trunks, Videl, and Gohan became victims to his rampage. It was only after some spiritual help from Goku that they were able to send Broly straight into the sun.