Nidorina, Known as the Poison Pin Pokémon, is comparatively larger than its pre-evolution, though she loses the forehead horn, whiskers, and incisor teeth. Nidorina is turquoise in coloration, with a pale underside. Nidorina's poison spikes are larger, and retract when they are relaxed. She has also gained the ability to stand on her hind legs. Nidorina is the female equivalent of Nidorino. This is shown even in her name, which ends in a as opposed to o in Nidorino. A is traditionally a feminine vowel in the English language, particularly at the ends of names.