Nidoran evolves at Level 16. As Nidorino, his 1 foot 8 inch height has increased to 2 feet 11 inches.
His weight also increases from 19.8 pounds to 43 pounds. The initial new attacks learnt are (Normal Type unless otherwise stated):
- Horn Attack
- Double Kick (Fight Type)
Depending on the game version (Gold, Silver, Crystal and Yellow or Red and Blue) further attacks are learnt at the following levels:
- Level 19 (Gold, Silver, Crystal and Yellow only): Poison Sting (Poison Type)
- Level 27/23: Focus Energy
- Level 36/32: Fury Attack
- Level 46/41: Horn Drill
- Level 50 (Red and Blue only): Double Kick (Fight Type)
To further evolve Nidorino into Nidoking, players must use the Moon Stone.