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* Personality.
* History.
Slime Mutant
Slime Mutant
Vital Statistics
Gender Male
Eye color Red
Other Statistics
Identity Emmanuel Raffalo
Reason Bank robbery
Production Details
First appearance SDMI: Beware the Beast from Below
Played by Dee Bradley Baker

The Slime Mutant was the disguise of Prof. Emmanuel Raffalo.

Physical appearance

The Slime Mutant was a humanoid skeleton covered in a green slime.


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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

Season one

Emmanuel Raffalo unmasked

Prof. Raffalo unmasked.

The Slime Mutant lurked below Crystal Cove and attacked people underground. After a confrontation with it underground, Mystery Incorporated eventually caught it, taking off its mask to reveal Prof. Emmanuel Raffalo underneath. Their teacher was using passageways from Fruitmeir's to the sewer system to steal from the Crystal Cove Bank.[1]

Season two

Famous artist Randy Warsaw had made graffiti art of the Slime Mutant and other fake monsters on a wall in Crystal Cove.[2]


When the Evil Entity's was defeated by getting sucked into a black hole, it created a chain reaction, altering reality for all of Crystal Cove, leaving the town unaffected by its negative influence, thus undoing Raffalo's misdeeds.[3]



Slime monster

Slime Mutant costume.


  1. Beware the Beast from Below, season 1, episode 1.
  2. Art of Darkness!, season 2, episode 6.
  3. Come Undone, season 2, episode 26.