The Slime Mutant was the disguise of Prof. Emmanuel Raffalo.
The Slime Mutant is a humanoid skeleton covered in a green slime.
Powers and abilities
The Slime Mutant could shoot large amounts of a liquid which can cocoon people. The liquid was revealed to be Fruitmeir's dessert.
Scooby-Doo! Mystery Incorporated
The Slime Mutant lurked below Crystal Cove and attacked people underground. Mystery Incorporated revealed that it Prof. Emmanuel Raffalo in disguise as the Slime Mutant, using passageways from Fruitmeir's to the sewer system to steal from the Crystal Cove bank. (Beware The Beast From Below)
- Scooby-Doo! Mystery Incorporated
- In the online game Scooby-Doo! Mystery Incorporated Crystal Cove Online the Slime Mutant costume is put on display at the Spook Museum.