Professor Monkey-For-A-Head

Professor Monkey-For-A-Head is one of the main villains from the Earthworm Jim series.

Story
The professor is a nasty scientist who has a chimpanzee grafted into his skull. This, however, is not the result of some failed experiment: the professor was born this way. This condition is shared by everyone on his family, like his great-aunt, the Baroness Beaver-For-A-Head. Although the monkey and the professor share the same brain and set of eyes, each have it's own personality. Because of his condition, the professor was constantly bullied when he was a kid, which made him grew mean. He used his brilliant mind to create a space station laboratory, where he and his monkey companion work on many evil machinery and experiments. He became a regular henchman of the Queen Pulsating, Bloated, Festering, Sweaty, Pus-filled, Malformed, Slug-For-A-Butt, helping her in her plans to conquer the universe. She ordered him to create a spacesuit for her to make her even more powerful, so the professor used his scientific genius to develop the ultra-high-tech-indestructible-super-space-cyber-suit. The queen ordered Psy-Crow to deliver the suit to her, but an accident made the suit to fall on Earth, where a worm entered it and mutated, becoming Earthworm Jim. Unable to create another suit, since the monkey had eaten the plans, both Psy-Crow and him were ordered to retrieve the suit, but the professor waited for Jim to arrive at his laboratory instead of pursuing him. Jim eventually finds his way into the space station, where the professor attempts to kill Jim by using the many traps he set. After all the traps fail and the professor is shot down by Jim, he sends a mechanical chicken to fight Jim, but it is destroyed by Jim, who flees and travels after the Queen.

The professor would attempt a revenge much time later, when Jim enters a coma after being bashed by a cow. Invading Jim's brain alongside other villains, the professor takes refuge into Jim's fears, unleashing an army of horror cliches and using an abandoned mansion in the bottom of Jim's mind to work on his experiments. Jim's super-ego fights all of his fears and make his way after the professor. The two fight each other, with Jim emerging victorious and expelling the professor out of his mind.

In the cartoon series, he plays the same role from the games. In one episode, however, he teams up with Psy-Crow to overthrow the Queen.

Personality
The professor has a really bad temper, shouting and threatening others all the time. He is usually arguing with the monkey, who loves to piss him off.