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Just an FYI, keep as Clefairy until level 45ish to learn Moonblast. Ability should change to Magic Guard upon evolution (Magic Guard doesn't exist in gen 3). Thanks for the trade!
It's just too bad that it's impossible to get them with the blue pentagon along with the tutor move ... but I guess the obscurity is what gives them value.
I tried to evolve those Clefairy, and they still kept Cute Charm. Now I need to play Battle Maison. Yeah, you are the only one on Smogon that have Soft-boiled Clefairy, so they are highly valuable.