Nidoking is a large, bipedal, purple Pokémon with distinct reptilian features. It has narrow eyes, large, spiny ears, fur-like tufts on its cheeks, and a short snout filled with pointed teeth. There is a long, venomous horn on its forehead and a ridge of spines down its back. Gray plates cover its chest and belly, and there is a gray rounded spine on each elbow. Each hand was three claws, while foot has only a single hoof-like nail. It has a long, powerful tail. This is a male only species; the female counterpart is Nidoqueen .