Dragon Ball Kai • S05E09 : Everyone is Shocked! Goten and Trunks' Super Battle!!
While Gohan and Videl wait to take their preliminaries, Goku, Vegeta, and the others go to spectate the junior division, where Goten and Trunks effortlessly progress through each round until they face each other in the final round. The battle gets more and more intense, with Goten and Trunks surprising the audience with advanced techniques and even turning Super Saiyan. The match eventually comes to an end where a sneak attack by Trunks causing Goten to lose by ring-out. Satan, who had spectated the fight and had been reminded of the battle with Cell, now faces a pinch as he now has to fight against Trunks.