I know you use wurmple but I always get dustox.
Some wurmples turn in to silcoon, and some turn into cascoon. cascoon evolves into dustox. silcoon evolves into beautifly. its a 50/50 chance if your going to get a silcoon or cascoon
Beautifly. Go to the petalburg woods and walk around until you see a silcoon. then use an exp. share and level it up to lvl 10.
You may meet Silcoon at Petalburg Woods (10%)
I would suggests just catching a silcoon and then walking around with him (possibly holding a soothe bell or whatever it's called in that game) until he evolves by happiness to become Beutifly.
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