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Yes, someone could make one. Problem is, it'd likely take longer than you're willing to wait whilst they crack the ability to add wondercards to B2/W2 (which if I remember, they still haven't been able to)
But unfortunately for you, most of the people who come up with AR codes usually don't come to GameFaqs, or have moved on from Gen 5 already and are working on trying to crack Gen6.
Long story short: You're out of luck and there's no point in making a thousand threads across four different boards.