At the carnival, Champ is persuaded to enter a boxing attraction with "The Australian Bounder", a fighting kangaroo. The winner receives $500.00 if he can stay 4 rounds with the animal. Doc and Champ are pleased to accept but the kangaroo and its manager don't exactly fight fair. To help Champ win, Doc comes up with a variety of schemes such as convincing the kangaroo that Champ is a mother... see more