Earth's days are numbered indeed. Boo, the indestructible djinn of inconceivable power, has been swinging around Earth like a wrecking ball, knocking down everything in his path and turning everyone into snacks. And that was before he transformed from a childish blob into an evil fighting machine. There's no telling what destruction will rain down now.The universe's ultimate champions are desperately scheming and training to find a way to stop this abominable bouncy ball. Gohan is undergoing a bizarre training regimen with former Lord of the Lords, but the old guy keeps nodding off. Meanwhile, Trunks and Goten are perfecting their fusion dance in the Room of Spirit and Time to become Super Gotenks, a level 3 Super Saiyan power combo with extra-special hair. But how can they make a dent in a monster that keeps bouncing back? If only there were a way they could bring Goku and Vegeta and their other friends back to Earth.