Vegeta attacks Buu again, hoping to delay him so Goku can power up the spirit bomb, but Goku is losing power. Goku falls out of Super Saiyan 3 and Vegeta asks for the final wish to restore Goku's power so he can use the Spirit Bomb. His power is restored and Buu is destroyed. Goku looks on and remarks that he wish he could fight Buu again just for fun. Goku saves the universe and peace is restored.
Ten Years pass.
Gohan marries Videl and they now have a young girl called Pan who is already very strong.
Goten and Trunks still train, but with no real threat they have been slacking off.
Vegeta and Bulma have a daughter called Bra.
Over the last few years Goku has been sensing a really strong Ki, and he has had word that this fighter will be competing in the tournament. Vegeta and Trunks along with Goten, Pan, and Goku enter to fight this strong warrior.
At the fighter selection pick Goku asks Innocent Buu to fix the selection so he gets to fight Ubuu, who just so happens to be the reincarnation of Evil Buu.
The tournament gets under way with Pan winning her first match with ease, Goku then goes to fight Ubuu. Although Ubuu is strong he does not know the full extents of his power, and Goku offers to train him, much to the annoyance of Chi-Chi. Goku flys away with Ubuu to start training