Katz

Katz is the most recurring villain in the cartoon Courage the Cowardly Dog. He is Courage's arch-nemesis and the show's primary antagonist. The main humor in his role is that Katz appears so much more the hero than Courage; he is athletic, intelligent, "handsome", and more sly than Courage; however, Katz is cruel and rude. He specializes in scam businesses such as a vacation resort, a confectionery shop, a motel, and a submarine cruise line, always with the intent to kill the patrons when he has no further need for them. He always cons Muriel and Eustace into trying whatever service he is providing, but Courage never falls for his schemes. All of his businesses enforce a strict "No Dogs Allowed" policy, forcing Courage to sneak in. He always enjoys a "little sport", as all of his battles with Courage are games such as a staring contest. His catchphrase (typically uttered whenever he gets injured) is "I wish you hadn't done that.".