Mickey Mouse

Mickey Mouse is a cartoon character created by Walt Disney.

History
In the Simpson family photo album there was a picture of Mickey Mouse punching Homer in the stomach with Goofy holding him. Marge showed him the photo when she was afraid that he might die.

When Bart spoke Latin, Lisa explained to Homer that he was speaking the language of Pluto. Homer then wondered if she meant Mickey Mouse's dog.

A man in a Mickey Mouse suit was confronted by a young Kent Brockman at Disneyland in a staff area. The man took off the head and told Kent that when he was on his break, the mouse was dead.

Non-canon
Ned says Maggie bears the mark of the beast, showing Homer and Marge a birthmark of Mickey's head between her hairs.