Duel Masters - Cobalt - Platform: Playstation 2

Play as Chuck:
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Hold [R3] and press [L1]x3 at the deck building screen to unlock 
Chuck in arcade mode.

Play as Shobu:
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Select versus mode and let player two choose a character. Then, have 
player one press [R2]x2, [L1], [R2], [X].

Cards do not run out in duel:
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Hold [R3] and press [Square]x3.

Remove shield:
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Hold [R3] and press [Triangle], [Square], [X] to remove one of player 
one's shields. Hold [R3] and press [Triangle], [Circle], [X] to remove 
one of player two's shields.

Add shield:
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Hold [R3] and press [X], [Square], [Triangle] to add one shield for 
player one. Hold [R3] and press [X], [Circle], [Triangle] to add one 
shield for player two.

Win duel:
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Hold [R3] and press [L1], [R1], [L1] to give player one the win. Hold [R3] 
and press [R1], [L1], [R1] to give player two the win.

Additional locations:
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Hold [R3] and press [Circle]x3 at the map screen.

Additional cards:
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Hold [R3] and press [L1]x3 at the deck building screen. 
You will get four of each card.