Did you use the beta version for black and white? Also If you load it on to black and white remember that aipom/ambipom is not obtainable in black and white so the location would have to be poké transfer.
Or i think (AND I AM NOT SURE) if you put in a location from another region and have it in black and white it might appear as ------ or i think the region the location was set in....Hope this helped ~EpicSui