When a notorious band of ninjas discovers a certain Metro City hero wearing their colors and practicing their Kat Fu, their leader sets out to settle an old score. Plus, a nocturnal ninja flaps into town, Octopunch puts up his dukes (all eight of 'em!), Adonis plays hero, Master Hamster's creative kitchen repairs end with a scorching surprise, and our favorite frenemies-against-the-odds compete in the villainous Vroomin' Race!