Tee'd Off / Monstro vs. The Wolf Hound

Heathcliff and the Nutmegs go to the country club so Grandpa can teach Iggy about the game of golf. Heathcliff scopes out the country club's restaurant and is targeted by a vengeful group of rodents. They trash the place and are promptly kicked out, so Heathcliff and the mice, plot revenge against the club. After a long night watching monster movies, Riff Raff dreams of being a mad scientist who brings to life Monstro (Mungo), who does battle with the Wolf Hound (Leroy). This is season 1, episode 11.