Unlock Characters
Go to custom player and enter any of the following names to unlock that character. Press DONE two times to activate. 

CODE           RESULT
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BARRY DEJAY    Barry Dejay 
LEMON BOY      Thor Herring 
KOBE           Kobe Bryant 
SHAQ           Shaquille O'Neal 
VINCE          Vince Carter 
MJ             Michael Jordan 
ALLEN IVERSON  Allen Iverson