Bojack, a space pirate, commanded the Galaxy Soldiers while waging genocidal campaigns across Universe 7's four galaxies. His reign of terror concluded when the four Kais—North, South, East, and West—imprisoned him within a star. This magical confinement endured until the Cell Games' destruction of King Kai's planet shattered his bonds. Freed, Bojack tracked residual energy to Earth, clashing with heroes in *Bojack Unbound* before Super Saiyan 2 Gohan defeated and killed him.
In *Super Dragon Ball Heroes*, the mad scientist Fu rescued Bojack moments before his death in *Bojack Unbound*. Recruited around Age 780 for the "Big Bang Mission," Fu augmented Bojack's power with Evil Aura energy. Consumed by vengeance against Gohan, Bojack trained relentlessly and expanded his hatred to all Saiyans, fueled by humiliation from his defeat. He attacked Turles upon confirming his Saiyan heritage and nursed resentment toward the Kais, including Supreme Kai of Time Chronoa.
Bojack's appearance evolved in *Super Dragon Ball Heroes*: his hair grew spikier, resembling Super Saiyan 3, and he replaced his band hat with a thick headband. New scars included an X-mark on his torso and a horizontal slash across his nose. He adopted a dark blue long coat with golden buckles. His base form retains teal skin and orange hair, while his transformation turns skin chartreuse and hair red, muscles shredding his attire.
Arrogant, bloodthirsty, yet pragmatic, Bojack belittles adversaries—mocking Saiyans and dismissing Beerus as myth. He displays cowardice when pressured, sacrificing subordinates like Zangya as shields. *Super Dragon Ball Heroes* reveals nuance: he sought to battle Gohan at full strength rather than exploit weaknesses, hinting at grudging respect. He took pride in his Hera Clan heritage, deeming it superior to Saiyans.
His abilities encompass martial arts mastery, ki manipulation for energy blasts and barriers, telekinesis, flight, and spaceflight. Fu's enhancement unlocked Evil Aura, amplifying Bojack's power to "Complex Multiverse" levels—enabling clashes with Super Saiyan Blue Goku and Super Saiyan 4 Xeno Goku. He exhibits extreme durability, surviving lethal blows to counterattack.
Across *Super Dragon Ball Heroes* sagas, Bojack was imprisoned in the Green Area (Slum Area in manga) during the Prison Planet Saga, wielding a Two-Star Special Dragon Ball. After battling Goku and Vegeta, he escaped defeat only to later fall against Future Trunks and Cooler. In the Universe Creation Saga, he joined Fu's warriors at the Universe Tree, assaulting Turles over anti-Saiyan hatred. His arc concluded by supplying Gohan intel on Fu's Pseudo Universe, hoping Gohan would destroy it.