Bojack

Bojack and his Galaxy Soldiers terrorized the cosmos long before the events of Dragon Ball Z, conquering worlds and leaving destruction in their wake. Their rampage was so severe that the four Kais of Universe 7 were forced to personally intervene, sealing Bojack and his crew inside a prison at the center of a star. The seal held for an unspecified but enormous period of time, keeping the pirates locked away while the universe moved on.

The seal is inadvertently broken when King Kai's planet is destroyed during the Cell Games, since King Kai was one of the anchors maintaining the barrier. Freed from his imprisonment, Bojack infiltrates an intergalactic martial arts tournament on Earth, having his soldiers replace the competitors in order to draw out the planet's strongest fighters. His Galaxy Soldiers systematically defeat Krillin, Yamcha, Tien, and even Trunks before Bojack himself takes center stage.

Gohan is the one who ultimately defeats Bojack. After being pushed to his limits and witnessing his friends being brutalized, Gohan taps into his Super Saiyan 2 power and overwhelms the pirate lord. Bojack's defeat is swift and decisive, reinforcing the idea that Gohan at his peak is among the most powerful fighters in the universe. As a villain, Bojack fills the role of a physical threat rather than a complex antagonist, but his intimidating presence and the creative setup of his imprisonment give the film a solid foundation.