Heathcliff and the Catillac Cats (1984)

Season 1: Episode 45

Heathcliff sneaks into the Van Corkingdale mansion to challenge Bruno, their ferocious guard dog, and determine who the real king of the neighborhood is. Inside, Heathcliff defeats Bruno, allowing burglars to raid the house! Later, when the some crooks attempt to burgle the Nutmeg home, Heathcliff traps them for the police, and returns all the previously stolen goods to the mansion.