What level does growlithe evolve on Pokemon Crystal?
He can't evolve by himself. You have to use a fire stone on Growlithe, which can happen at any level.
one of the only and the best fire pokemon you get on pokemon crystal is Growlithe, because when you evolve it with a fire stone it evolves into Arcanine, which is pretty tough. but remember to evolve it after growlithe turns to level 34, after it learns flame wheel. and also remember that you cant evolve it without a fire stone! :)