Golduck does not evolve
On level 40
He will evolve I think on level 36. I don't remember really.
In Pokémon Gold, Spinarak will evolve into Ariados starting at Level 22.
spinark evolves on level 23 in heart gold
It doesn't evolve at a certain level, instead, in order for Piloswine to evolve into Mamoswine, Piloswine has to be taught AncientPower
Pysduck evolves in Golduck at level 33. It's not a gold duck though, it's blue....:)
He evolves into platinum duck if you press the right arrow enough times.
You have to have it have high happiness. It doesn't evolve at a level.
Wooper will evolve at Level 20.
Unowns do not evolve.
Level 30
Snorlax does not evolve. In gold, it is a non-evolutionary pokemon.
Farfetch'd is a Pokemon that does not evolve.
level 30
level 14
level 31
Level 55.