It varies on what Pokemon you want to evolve. Some Pokemon evolve by leveling up while others require a stone. Some need friendship while others need to be trained in a specefic place.
haunter has to be traded to evlove haunter evolve into gengar in level 42
Evolve Snorunt. Snorunt can be found in Shoal Cave Ice Room
The water stone is for evolving water Pokemon .If you are a real trainer you will let your Pokmon evolve by level.Only if your Pokemon is a water type and doesn't evolve by trading you could evolve it with a water stone. All stones have the same information by their own type.
Yes, Vullaby does evolve in Pokémon White, it will evolve into Mandibuzz at level 54.
Tynamo will evolve into Elektrik will evolve into Elektross with a thunderstone in Pokemon White.
No, Cryogonal does not evolve in pokemon black and white
ABXY
Emolga does not evolve. I played Pokemon White also and it does not evolve. Some Pokemon do but this one does not evolve.
Sadly, no. The creators of the game forgot to add in the Pokedex, so trading is impossible without GameShark. :(
Cryogonal do not evolve.
He does not evolve.
It does not evolve.