Lizard Mutant (10) - A lizard monster. It can bite, attack with its tail, and regenerate its tail if cut off. Lizard Mutant was sent by Gorgom to assist Professor Kuromatsu into causing car accidents and fake ambulances in order to turn its victims into Gorgom's terrorist group to start a World War. Kotaro went undercover until Professor Kuromatsu appeared. Once Kotaro was revealed, Lizard Mutant appeared and a battle with Kamen Rider BLACK began. Battle Hopper tackled Lizard Mutant before it was destroyed by the Rider Kick.