A Night at the Katz Motel - Season 1,Episode 1 (1999)

Courage, Muriel, and Eustace stay at a motel and get freaked out by spiders and a crazy cat called Katz, who hunts them down. Muriel comes to the rescue and saves Courage from Katz, then takes everyone home.

P.S.In "A Night at the Katz Motel," they stay in room number 666 1/2. 666 is said to be the number of Satan, so this was either to add comedy to it or to prevent the use of the number.
In "Katz Motel," when Katz holds the racket, the handle has fewer stripes than it does when Muriel is holding it.