I was not able to post or visit this site too much for the past 3 years, but I tried my best to keep up with the new generation. Hopefully I don't go away again, I miss talking about Pokemon to people who actually enjoy it also not just play it for fun and best it, them stop playing.
I believe it is possible to get both on the same Nintendo DS and Pokemon Game
I believe you can always delete the Wonder card you got from the Gamestop one and still get it from Wi-Fi. Because not everyone is able to get one from Gamestop