If you were one of the lucky souls out at the San Diego Comic Con last week, Nintendo were giving out a different card for the Pokédex 3D every single day.
Apparently you can print out the following Pokémon and scan them with your Pokédex 3D and even take some pictures. I’ve not tried this out on my 3DS yet, so fingers crossed they work. If they do, let us know. Better start collecting.