Alf

Alf is an alien from the planet Melmac. He crash-landed on the UnWorld and briefly lived with a family called the Tanners, but he was kicked out for trying to eat their cat. Now he goes around stealing people's pet cats and eating them. They try to put him in jail, but for some reason, he can teleport.
==Trivia==
*Alf is technically defeatable, but he can't die of old age, and every time you come at him with a weapon, he teleports away. This makes him a "de-facto" Undefeatable.