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She doesn't seem to be "special" enough to be Fair/SDCC exclusive (considering the pones they've had in years past).
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You might say there's--Ugh, just what we need--another Pinkie Pie. Feh, with all the much better choices they could pick from for either SDCC and Fair why pick a slightly gothed Pinkie? I hope she's not the SDCC/Fair pony.