Rat and Weasel are two wicked animals that own a mattress which harbors a demon. Rat is hunch backed, with brown fur and red eyes, and a stitched scar on his side. Weasel has purple fur, a rattlesnake tail, a big, blue, bug eye and a normal eye.
After "The Demon in the Mattress", Rat and Weasel were not seen again until "Courage in the Big Stinkin' City", where they drove Courage to the creepy condemned building. Rat' s first appearance is The Demon in the Mattress, next is Courage In The Big Stinkin' City/Transcript and the last appearance is The Tower of Dr. Zalost, Weasel only appears in The Demon in the Mattress and Courage In The Big Stinkin' City/Transcript.