This trick requires two memory cards and controllers. Save a file (the one you want to keep) on a memory card. Next, on a second memory card, create a file that is temporary. Get considerably far or as far as you would like. When you get a card you really like and you cannot get more of them because of lack of experience, copy your file that you want to keep on the first memory card as many times as desired. Then, go to two player mode. Place your first copied file as player one and the temporary file (on the second memory card) as player two. Bet the cards you want to copy from player one, then lose the match. Switch to the file that is (non-copied on the first memory card) and have player two bet the cards that they just won. Win the match for player one. Repeat this as many times as desired. To copy a file, go to single player and save under open slots.