The complete Pokemon GSC pokedex, part 6

Pokémon Name: Steelix
Type: Steel/Ground
Classification: Iron Snake Pokemon
Pokédex Number: 207
Ability: Rock Head & Sturdy
Dream World ability: Sheer Force
Location Found:
Diamond/Pearl: Iron Mountain, Snowpoint Temple, Victory Road
Platinum: Victory Road, Iron Island
HG/SS: Route 47 (cave), Mt. Silver, trading any Pokemon with Jasmine
B/W: Evolve Onix
Evolution: From Onix via Metal Coat