But the Ace3DS+' AOS should support Black and White 2:
Newest Supported Games
pokemon hwaiteu 2 (korea)
pokemon beullaeg 2 (korea)
[...]
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pokemon - version blanche 2 (france)
pokemon - version noire 2 (france)
pokemon - schwarze edition 2 (germany)
pokemon - versione bianca 2 (italy)
pokemon - edicion negra 2 (spain)
pokemon - edicion blanca 2 (spain)
pokemon - versione nera 2 (italy)
pokemon - weisse edition 2 (germany)
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(
http://ace3ds.com/plus games-updated.html)