Hmmm doesnt seem to work for my Pokemon Diamond (US)
CIAcia or 3dsx?
The CIA build requires an access to CFWs. If it's the case, this is the best option; you'll be able to see the awesome banner @Apache Thunder made .
The 3dsx build requires you to have either PokéTransporter or Pokémon Dream Radar installed on your 3DS. In both cases you'll need to pay to be able to download them.
I only have Pokemon Diamond :3Tried any other DS games? Works for me just fine.