The complete Pokemon RBY pokedex, part 5

Pokémon Name: Golduck
Type: Water
Classification: Duck Pokemon
Pokédex Number: 055
Ability: Damp and Cloud Nine
Dream World ability: Swift Swim
Useful Attacks: Hydro Pump
Location Found:
D/P/P: Pretty much anywhere you Surf
HG/SS: Routes 6 and 35, Ilex Forest (via Surfing), Mt. Silver
B/W: Route 11, Route 14, Village Bridge

More power, but the same moves as Psyduck. Evolution nets you higher stats but that's about it. Hydro Pump still kills though, and the mix of Psychic and Water special attacks makes for a bizarre fight.

Evolution: From Psyduck at 33