The South Kai's best student & claims that Papoi could mop the floor with Goku. King Kai & South Kai start to debate who's stronger, (meanwhile Goku is training in the background with 2 ton weights on his arms and legs). Both Kai's get competitive, so North Kai tells South Kai to increase each weight on Goku to 10 tons. At first Goku can barely move, but he simply turns Super Saiyan and starts zipping around like lightning. South Kai's jaw hits the ground, and he quickly says that Papoi shouldn't waste his time fighting Goku. From Dragon Ball Wiki, a Wikia wiki.