Mushroom Monster
From Multiversal Omnipedia
Dr. Viper's Mushroom Monster (nicknamed "Fungusface") was the hulking assistant to Dr. Viper, a half Kat, half mushroom monstrosity he created to help him steal Katalyst 100. He later stuck by Viper's side during the evil biochemist's time as a member of the Invincible Alliance of Evil.
Unlike most of Viper's monsters, the mushroom monster actually seemed to possess some intelligence, not to mention a personality. However, he does share one thing in common with the rest of his master's creations - he's nearly impossible to destroy, able to survive even enormous explosions that splatter him all over the Turbokat.
