6x4 - Dragon Ball Z: Dragon Box

Trunks, as champion of the junior division, is allowed to fight Satan in an exhibition match! However, after Satan sees the way he fought during the championship match, he is terrified of Trunks and attempts to lose to him intentionally after a light punch. However, Trunks' "light" punch connects squarely with Satan's face! Meanwhile, having won their way through the preliminaries, Goku and the others encounter the mysterious contestants Shin and Kibit.