Top Cat and the Beverly Hills Cats is a 1988 animated made-for-television film produced by Hanna-Barbera for syndication as part of the Hanna-Barbera Superstars 10 series. The movie's plot is essentially an extended remake of the original show's episodes, "The Missing Heir" and "The Golden Fleecing".
Beverly hills dowager leaves everything to Benny the Ball because her only rightful heir, her niece Amy, is missing. But that's only if Benny stays alive for 48 hours. If not, evil butler Snerdly and his mad Russian Wolfhound are next in line - and he's quick to pull every trick in the book to do poor Benny in and the troop sets off to rescue Benny and find the lost heir Amy.