Dr. Eva Mudlark is an evil scientist who creates monsters from garbage. Most of her anger comes from centuries of family oppression as lowly garbage collectors. The Aquabats! seem to be Mudlark's newest arch nemeses for destroying her Muck Monsters earlier in the episode, though they don't have a clue about it at first. Dr. Mudlark is a woman with blond messy hair, horribly applied smudged red lipstick, and large glasses. Her outfit is tattered, dirty, and mismatched.