I moved the line of questioning to our FAQ thread.
Now:
1. You'll need CFW/homebrew on your 3DS (guide, at your own risk)
2. Learn how to extract and import saves on your 3DS (our guide)
3. Learn how to import wonder cards (our guide)
If you're unable to do any of the steps above, go back to waiting for a trade.
I know you've already posted a trade request, so no need to post another one nor bump the old one.