you have to like it very much and give it lots of rare candies.
Snorlax does not evolve. In gold, it is a non-evolutionary pokemon.
Magmar doesn't evolve in Pokemon Red, Blue, Yellow, Green, Silver, Gold, Crystal, Ruby, Sapphire, Emerald, FireRed, or GreenLeaf. It can only evolve in the newer Pokemon games.
Unowns do not evolve.
You have to have it have high happiness. It doesn't evolve at a level.
Wooper will evolve at Level 20.
LEVEL 25
Farfetch'd is a Pokemon that does not evolve.
22
you have to trade
Level 21
Level 42
It evolves at level 16.