Alpha-sapphire: Nidoran♂ has developed muscles for moving its ears. Thanks to them, the ears can be freely moved in any direction. Even the slightest sound does not escape this Pokémon’s notice.Y: Its large ears are flapped like wings when it is listening to distant sounds. It extends toxic barbs when angered.X: It scans its surroundings by raising its ears out of the grass. Its toxic horn is for protection.
Prof. Lotus' Notes: The name is a portmanteau of the Japanese borrowed word for Needle, ニドル (Nedoru), cnidocyte (thing in all poisonous animals) and rhino. Finally, 二度 or Nido in Japanese can be translated to 'two times' and this is often attributed to Nidoran line splitting to male and female.
Gender Differences: Female is light blue and male is purple
Separate evolutionary lines