The complete Pokemon RBY pokedex, part 4

Pokémon Name: Nidoking
Type: Poison/Ground
Classification: Drill Pokemon
Pokédex Number: 034
Ability: Poison Point
Dream World ability: Sheer Force
Useful Attacks: Megahorn
Location Found:
D/P/P/HG/SS: Evolve from Nidorino
Black: Trade, Poke Transfer
White: Evolve from Nidorino

Using a Moon Stone on Nidorino gets you Nidoking, a ferocious battler armed with three devastating moves. It's up to you to decide when the evolution takes place.

Evolution: From Nidorino via Moon Stone