Well if it's a Diamond/Perl download you'll get the Pokemon through a Nintendo Hotspot via Wonder-card. Those wondercards can be dumped from your game and given to other people via Pokesave as the Pokemon get their Stats not as long you don't get them from the Pokemon-shop.
So it's like you downloaded the card yourself, even though you put it in via Pokesave. Furthermore you can change a bit in the card and make it so that you can give it to an infinite number of friends via Wifi...
But thanks raulpica for the translation. I really didn't know what he meant. o.O
@Jran Sakarra
If you have a Slot-1 just get Deoxys with that. Than you won't have to dump anything, as it's allready on your micro-sd. And yes it works with Flashcards, I even got Darkrai on an R4.