Grim's refusal to help Mandy win a karate tournament, and the $50 000 dollar prize it promises to the winner, leads her to a curio shop, where the shopkeeper, Kuan Ti, gives her an ancient "Chicken Ball" which, when eaten, allows her to become a great fighter. Subsequently, Mandy easily wins the tournament and doesn't care about the money anymore, only about fighting. It turns out Kuan Ti is actually Eris in disguise, and this was just another of her schemes to create chaos. To stop Mandy, Grim makes Billy a superb fighter too, and he and Mandy fight ferociously until the entire arena is destroyed, (note: this episode is an obvious parody of Dragon Ball Z). In the end, Mandy still demands the prize money, which she uses to buy Hector Con Carne's (from Evil Con Carne) Bunny Island.