All Working Duel Masters: Cobalt Cheats - Playstation 2

Win duel
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
Hold [R3] and press [Circle]x3 at the map screen.

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

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

Add shield
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.

Caitlan
To get Caitlan, complete Rusty's story.

Earl
To get Earl, complete Trey's story.

Knight
To get Knight, complete everyone's story.

Monks
To get the monks, you must defeat them the first time.

Widow
To get the Widow, defeat her at the end of the tournament.