Psy-Crow
Psy-Crow (referred to as Psy-Crow, Scourge of the Space Lanes in the animated television series) is a recurring villain in the Earthworm Jim franchise, often said in most iterations to be the arch-nemesis of Earthworm Jim, since crows are the arch-nemesis of earthworms everywhere.
Psy-Crow is also the reason for Jim's existence, since Psy-Crow accidentally dropped the Super Suit on Jim in the first place when transporting the Super Suit to Queen Slug-for-a-Butt. They then became rivals as they try to retrieve the suit back time and time again, whether it's a ransom or simply throwing him out of it like many others do.
Psy-Crow has made it his goal in life to destroy Jim and recover the Super Suit, or at least thwart him in any way he can, such as frequently kidnapping Jim's love interest Princess What's-Her-Name.