Yu-gi-oh 5d's - Tag Force 5 Info

Easy DP, Start to Finish - Yu-Gi-Oh! 5D's Tag Force 5 - GameFAQs

Located outside the card shop, this statue charges as you receive duplicate cards (limit is 9 copies). Once it glows, you can use it to receive an extra copy of any card you already own. Yu-Gi-Oh 5D's - Tag Force 5

You can customize your partner's deck, but certain "Favorite" cards are locked and cannot be removed. Easy DP, Start to Finish - Yu-Gi-Oh