Mutonians are monsters of Erwin who appear under his control. They appear in Pac-Man World 3.
The Mutonians appear as dumb brutes of Erwin, which may be part robot because of their appearance. They are agressive and they attack with no strategy.
The Mutonians may be mutants because of the rute "mut" in their names. Their faces appear dumb and almost half resemble those of armalopes. They appear as cyborgs, they resemble no known species, and must be a type of creature that can only be found in Pac-Land. They appear as herbivores and may also be part robot.