The Z-Fighters are competing in tournament that some rich dude organises for his son's birthday party. Everyone's sparring with eachother to try to make it to the last round, except Yamcha. He's taking a nap, so he's disqualified. Advancing are Krillin, Piccolo, Tien, Gohan and Future Trunks. Krillin fights Piccolo for a little while, but Piccolo leaves, because Krillin wasn't a challenge to him. Gohan has to fight some fat guy, who is easily knocked out by Gohan's tackle. Trunks and Tien are evenly matched, but when Trunks turns Super Saiyan, Tien doesn't stand a chance.
Meanwhile, the former world champion Hercule is trying to sneak away, because he can't beat any of the Z-fighters. His attempts fail several times, so he still has to fight. The finalists are Krillin, Gohan and Trunks. These 3 , together with Hercule, were gonna fight some master fighters, but Bojack and his crew sent them to the other dimension.
The Bojack gang was locked away somewhere by the 4 Kai's,so when Goku made Cell explode on King Kai's planet, the seal was broken.
Krillin has to fight Zangya, the girl member, but she kicks his ass easily. Trunks overcomes his opponent, Gokua, but when Gokua transforms, Trunks gets knocked out by one kick. Now Bojack, Bido, Bujin, Gokua and Zangya focus on Gohan. Gohan doesn't stand a chance, so Tien and Yamcha come to the rescue, though they aren't much of a help.
Vegeta is lying at his bed watching tv, when he senses high power ratings. He puts on his armor and takes Trunks' sword, and he takes off.
Gohan is now Super Saiyan, and he holds out against the 4 helpers pretty good, but then they trap him and Trunks in some sorta web, which they fire with their hands. Vegeta finally arrived and helps a little too, and tosses Trunks his sword. Now he cuts the web away, and they can fight freely again. They fight a little, and then land at some spot. They threaten eachother for a while, and then fight again. Bojack has transformed, and grabs Gohan in a bear hug, which almost breaks Gohan's chest.
At snake way Goku, Bubbles, Gregory and King Kai are following the battle. Now, Goku can't stand it anymore that Gohan is suffering so much. He teleports, and punches Bojack in the face, which makes him let go of Gohan. Now Goku gives Gohan some speech about the whole universe depending on him, and that he should turn Super Saiyan stage 2. This enrages Gohan, which makes him turn Super Saiyan 2. The gang attacks Gohan again, but he kicks Bujin in half, and easily blasts Gokua and Bido away. Zangya is scared as HFIL, so she steps backwards. Bojack doesn't like cowards, so he sticks his hand through Zangya's belly. Now the whole gang is dead, so Bojack is angry once again. He attacks Gohan, but Gohan dodges, and punches through Bojack's stomach. Bojack fires some big fireball, but Gohan fires his Kamehameha to block it. Bojack is eventually sent to the other dimension with that Kamehameha.
Once again, no good guys died, evil has been eliminated, everything returns to normal...:D