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Gamecube - Duel Masters cheats

Unlock Caitlan: Finish Rusty's story 
Unlock Earl: Finish Trey's story 
Unlock Jalen: Finish Rebecca's story. 
Unlock Knight: Finish everyone's story.
Unlock Marcus: Finish Flynn's story.
Unlock Monks: Beat them the first time. 
Unlock Sera: Finish Luc's story.
Unlock Widow: Neat Widow at the end of the tournament.