The complete Pokemon RBY pokedex, part 3

Pokémon Name: Ekans
Type: Poison
Classification: Snake Pokemon
Pokédex Number: 023
Ability: Shed Skin and Intimidate
Dream World ability: Unnerve
Useful Attacks: Bite
Location Found:
D/P/P: Route 212 (South) with FireRed inserted
HG: Goldenrod Game Corner, Safari Zone (Marshland area)
SS: Routes 3, 4, 32, 33 and 37, Safari Zone (Marshland area)
B/W: Poke Transfer

Ekans, an early Team Rocket favorite, is another quick-to-grow Pokemon that you can use and abuse early on. Its many status effect and poison moves can make life miserable for opponents, but that's practically all it's good for - Bite is pretty much the only useful attack it's going to learn. Fun fact: Ekans is Snake backwards.

Evolution: To Arbok at 22