S2E14: Monster Con

Van Helsing, the famous legendary monster hunter, and his assistant, Tom, stop at a hotel, where a Monster Convention is taking place. While there, the cat uses some of Van Helsing's equipment to try to catch Jerry, but he catches a few ghosts instead. Later, Tom gets bitten by a werewolf and transforms into a panther, which makes him a target for Van Helsing, who mistakes him for a werewolf cat and seeks to add him to his collection.