*2 controllers & 2 Memory Cards are required to do this
First you are going to copy the data from 1 memory card to the other memory card then load both profiles in 2 Player V.S. mode. Pick which player you want to lose, have then bet the cards you want (the rare cards), and have the player you want to win just bet some weak cards (the non-rare card). When the losing player loses save the prize to the winning memory card. This can repeat this as long as you can copy the winning memory card and do it again.