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yes having someone pokeshift it and then trade it to you then you trade me yours via 5th gen is fine, unfortunately if it isn't tomorrow it'll have to wait as I go out of town from Weds-Sun.
I've been doing a lot of Gen 4 BP's, so I haven't even advanced in Gen 5. If you'd like I can try and find someone to shift a copy to Gen 5 then trade to you, and when you receive it you just trade yours to me on my White.