Mickey Mouse is the cartoon mascot of Disney. He is the main antagonist in the episode Terms of Endearment, where he was shown to be the evil headmaster of the KFCC. There, he was sending out all of his troops to go and kidnap all of the politically incorrect cartoon characters and eradicate them from existence. Mickey's face was in the shadows and he was wearing a big cape, so that all that was visible were his eyes, ears, and arms and every time a character mentioned his name, it would be cut from their dialogue so that all that would be heard is "M_____ Mouse" or "Mickey M__se", making a joke about copyright issues.
Mickey Mouse was only seen in the shadows and behind a cape so little is known about his appearance. However, we do know that Mickey is a really tall mouse with the same head shape. His pupils are red and he wears white gloves and a villainous cape.