Lizzinator was an extremely powerful lizard monster that possessed Herculean strength, able to lift cars and huge boulders with ease. He also had the ability to fire explosive red energy beams from his eyes and an explosive, gaseous spray from his mouth, which he dubbed his "Super Stink Breath." He had a German accent and sounded like Arnold Schwarzenegger. Created by Finster to destroy the Power Rangers, Lizzinator was forged from supermetals from another galaxy. First encountering Jason, the Lizzinator was unfazed by the Red Ranger's assaults and easily overpowered him. Bored with the fight, the reptile retreated, saying he would come back when he could face all six Rangers together. When Lizzinator appeared next, he was met with the full team, and again gave Jason quite a beating, assaulting him with massive boulders.
Lizzinator might have destroyed Jason if Tommy hadn't intervened, distracting Lizzinator and giving him a rather good pounding. Grown to giant size by Rita, Lizzinator easily overwhelmed the Rangers' Dragonzord and Megazord, so the Rangers quickly formed the Ultrazord. The Ultrazord was able to break through Lizzinator's metal skin with its superior firepower, destroying him in a burst of flame.
Lizzinator was later seen chasing after the Rangers right after Zedd and Rita's wedding, assisting along with the other monsters that had attended their wedding. Much later, Finster recreated Lizzinator (without his German accent) to help Rito Revolto ambush and destroy the Thunderzords. Lizzinator was successful in demolishing the Zords, but was never seen again.