The Sludge Monster is a creature made of sludge.

In the comic strip, Garfield watches a movie about the Sludge Monster, which made him paranoid for a week. Later, he, Jon and Liz saw The Sludge Monster Meets Vermin Man at a drive-in theater, with Garfield rooting for the Sludge Monster. It was the ninth time Jon and him had watched the film.

In Garfield and Friends, it was a local folk tale that Jon used to scare Garfield and Odie while they were staying at a hotel. When the three of them leave (due to Garfield and Odie's antics), the sludge monster turns out to be an invisible friend of the hotel clerk named Maurice.

Episode Appearances

Garfield and Friends

Season 2

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