I count on you, my creations, to protect me from Feral, his Enforcers, and most of all, those meddling SWAT Kats! - Dr. Viper
Creatures bio-engineered by Dr. Viper and used to take over Megakat Tower. They came in several varieties and sizes, including static, ground mobile and air-mobile versions, all capable of spitting corrosive acid. All of them were immune to conventional weapons, including projectile, flame, chemical and electrical based attacks, though they were susceptible to extremely low temperatures and could be frozen and made brittle. All plantimals were destroyed when the SWAT Kats dropped a large canister of rocket coolant on the building.