Duel Masters Cheats
Enter The cheat when you're in a duel.
Code: Hold R3 and press L1, R1, L1
Player 2 instant win
While in a duel enter the following.
Code: Hold R3 Press R1, L1, R1
Unlock Widow and Knight and play in Tournament
Goto Story mode and Play as one of the Characters That you haven't started on yet, then duel the first couple of people using the Instant win Cheat then go to see what your mission is.Next go to that place and it should take you into the Tournament And defeat the tournament using the Instant Win Cheat (This does not give you the 5 cards)
Unlock Widow and Knight
Go on Story mode and chose the fire dude. You will be at the park. Duel the first two duelists there and beat them. Then go to the restaurant and go back to the park and it should take you directly to tournament then beat the tournament.