Episode 111, "What Incredible Kids!! The Great Struggles of No. 18"
Synopsis: Goku, Vegeta, and Gohan are losing patience waiting for Babidi's next fighter. Back at the Budoukai, Mighty Mask (Goten and Trunks) and 18 engage in intense hand to hand combat in the air while Mr. Satan looks on in dismay. 18 is formidable, forcing the boys to both transform into Super Saiyans. However, 18 recognizes the aura and exposes them. The two children are disqualified, and not wanting to get in trouble, they fly off. Now the finalists are down to 18 and Mr. Satan and the latter knows he doesn't stand a chance. Goten and Trunks encounter Videl on her way back to the arena.