I have an imported DS. It's a Hot-rod red Mario Kart special edition and was imported from canada - bought from dvdboxoffice.com).
My problem is that here in the UK it doesn't seem able to connect via wi-fi. I don't have a wireless router myself but i have tried at friend's houses, my brothers house and at airports and train stations. I've never been able to get this DS to connect.
Does anyone know if foreign DS can't connect to the nintendo network if they're not in their country of origin? I can't see another way to explain it as i've tried everything, though it seems very strange since traditionally nintendo hand helds are region free.