How do you evolve wurmple to silcoon?

Well I think what you have to do is get a wurmple under level 10 and then level it to 10... but it may turn into a cascoon. ALso if you cant get a silcoon in or near enterna forest then try trading someone who has the opposite game to yours(e.g. you have pearl they have diamond)and give them a cascoon for a sicoon.Or make your wurmple hold EXP. SHARE and battle stuff with another pokemon.