|Abilities||Poison Point, Rivalry, Sheer Force (Hidden)|
|Episode First Shown in||A Chansey Operation|
|First Known Owner||Gary|
|First Game Appeared in|
|National Dex Number||034|
Nidoking has a large, purple forehead horn along with spines following behind it, going down it's back. Everything but the inside of it's ears and its belly. It has four claws on its hands and three claws on its feet. It has a large, long purple tail. The inside of its ears are blue, and its underbelly is tan.
- A wild Nidoking appeared in Return to Viridian.
- Gary's Nidoking debuted in Vs. Blastoise.
- A Nidoking participates in the Pokéathlon in Vs. Golem and Vs. Machamp.
- Terra's Nidoking appeared in The Ace Named Terra.
- Ken's Nidoking appeared in Vs. Nidoking.
- Hunter J's henchman used Nidoking in Eggtastrophe, Rise of the Nightmare King, and Vs. Regigigas.
- Red caught a Nidoking in Red Caught Pokemon & Charlie Caught Cold.
- Focus Energy
- Double Kick
- Poison Sting
- Chip Away
- Earth Power