6x15 - Dragon Ball Z: Dragon Box

The battle within Babidi's spaceship continues. Meanwhile, at the tournament grounds, as a result of most of the contestants dropping out of the competition, the tournament's championship is declared to be a battle royale. No. 18 and Mighty Mask, in the form of Goten and Trunks, quickly send all the contestants except for Satan out of the ring to their defeat, and then turn their attention on each other, engaging in an intense battle, all the while ignoring Satan!