You need 3 memory cards, and 1 has to be empty, and 2 have to have different save games. Don't put in the game disc, it will say CD player and memory card. Before going to memory card, put the 1 with all the good cards in 1 slot, and the empty 1 in the other. Go to memory card 1, then select copy on Yu-Gi-Oh! Forbidden Memories. It will get copied, then put in the game, then trade with the other memory card, and presto! You have traded cards without actually losing them!(thats why i call it duplicating)
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