Gigantic Plantimals that acted as “tanks” for Dr. Viper’s Plantimal army, capable of spewing acidic slime from three tentacles on their backs. One of these guarded the front entrance to the Megakat Tower when Dr. Viper took it over. The Enforcers’ efforts to use weed killer against it only caused it to grow in size and mutate hideously. When the SWAT Kats froze the building using super rocket coolant, the Behemoth was frozen by the rush of icy air. Debris falling from the damaged building hit it, shattering it.