Instructions
Begin your game of "Yu-Gi-Oh! Duelists of the Roses." Make sure you are on the map screen.
Use the directional pad to move the cursor over the deck symbol and press the "X" button. This will take you to the deck-building screen.
Press the "R3" button to bring up the password menu. Enter the eight-character password from your card and press the "X" button. The card you entered will be added to your game if you typed the password successfully.