Dragon Ball Z: Bojack Unbound

Bojack is a demon who was freed from prison when King Kai's planet was destroyed. Now, without his father Goku by his side, can Gohan save the Earth?
Mr. Money is holding another World Martial Arts Tournament and Mr. Satan invites everyone in the world to join in. Little does he know that Bojack, an ancient villain who has escaped his prison, is competing. Since Goku is currently dead, it is up to Gohan, Vegeta, and Trunks to defeat Bojack and his henchman.