It should be unlocked after completing the main story.
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you can't unlock Eddie Guerrero on smack down vs raw 2010
on wwe 2010 how do you unlock casket match
do battles/ time attack in old city at the computer in any duel runner shops
how do you unlock mick foley in smackdown v.s. raw 2009
you can only use cheat codes for psp for svr09 go to some site an it will show lyk psp cheats and you can play as him but for other systems you cant.