Pixie and Dixie are walking along the street when they see atruck go by with a sign that says "Kapow - World's Greatest Boxing Kangaroo" and the back door is open and a box falls out. It's Kapow. The mice take him home to take care of him until his trainer comes looking for him. Jinks sees them walk by in the yard and he stops them. Jinks thinks Kapow is a big mouse and the mice try and tell him that Kapow is a kangaroo but Jinks doesn't believe them.
Jinks challenges Kapow to a fight and he finds out the hard way that Kapow can realy box. Jinks gives up and is going to go away when Kapow's trainer shows up to take him to the television studio. Jinks can't believe that they would put a mouse on t.v. so he stays to watch the show and finally believes that Kapow is a kangaroo.