I'm not to sure about level, but you MUST give it a thunderstone.
20
lv 16
pidgey evolves at lv18
in the snowy mountains but you have to eveolve it
Vigoroth evolves into Slaking at level 36.
Kirlia evolves at Lv 30.
The probably do, but what they eveolve into has not be discussed.
Crocanaw evolves at lvl 30
well to do that go on the game you want and go on the pokedex and look up the pokemon you want to eveolve it may not tell you when it will it will eveolve. but some pokemon like golbat only eveolve by love and if you treat it well it may evelove! i should know for im a pokemon master on pokemon soul silver
You have to use a "moonstone". It wont eveolve othervise.
yes into a ledian just have patience in training it
Dragonair evolves into Dragonite at Level 55. :)