Species: mutant neopet
A Mutant neopet is a neopet whose body has been significantly altered by a potion from Dr. Frank Sloth, one of the Neopets universe's main antagonists. They often look malformed or decrepit. Out of the neopet colour options, this is one of the ones that most drastically alters a pet's appearance.
See also: darigan neopet
This tag implicates neopet_(species) (learn more).