The Money Family is hosting a Tenkaichi Budoukai as a birthday present for there 10-year old son, Dollar Money. Dollar is hoping for aliens to come from space and join in the tournament, so four of Mr. Satan's pro-wrestling students are in costume as the "aliens" in the final rounds of the competition. King Kai and Goku are in the After Life, both are dead, King Kai watches T.V as Goku plays go fish with Bubbles. The elimination rounds are basically 8 batches of free for alls. The last person standing in each free for all goes on to a one-on-one round. The Final Four each get shot into one of four "Battle Stages" to face Satan's "aliens." The first person to emerge from the Battle Stage wins the 100,000,000 zenni prize money, a trip to a hot spa, and a chance to fight Satan. Krillin, Future Trunks, teenaged Gohan, and Dosukoi make it to the Battle Zones. This is were real aliens attack them. These real aliens have killed Satan's students! King Kai realizes that the aliens are of Bojack's warriors. A long time ago, the four Kaiou's had battled Bojack, and imprisoned him far, far away. Bojack has escaped, and come to Earth to destroy it and kill Gohan as revenge on King Kai, knowing that Goku is King Kai's student, Gohan is Goku's kid, and Earth is Goku's planet. There is a lot of fighting as all of the Z Fighters show up to attack Bojack's 5-man team. Eventually, the heroes are trashed, and Bojack is about to crush Gohan's throat. Goku can't take it any more and pleads to Gohan to fight. With renewed anger, Gohan goes to Super Saiyan level 2, and kills Bojack's remaining minions. Then finally destroys Bojack. Satan was sent to help fight these aliens and had been trying to escape since seeing that the Z Fighters had entered the tournament. Unfortunately he succeeded in destroying the camera televising the fight with Bojack. So in the end everyone thinks Mr. Satan saved the day.