|First Appearance||A Night At Katz Motel|
|Last Appearance||Ball of Revenge|
Katz is a cat, Courage's main nemesis and the show's recurring 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 confectionary 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. In Ball of Revenge, he fell into a chasm (due to Courage's screaming) and thought to be dead.