At the Start Menu, enter the following codes with the D-Pad to unlock the respective characters. A 'Yo Joe!" sound will be heard if the codes you entered are correct (The voice will be a male voice for Duke and female voice for Scarlett). Note: The characters are separated from the modern outfit characters.
Code Effect Left, Up, Square, Up, Right, Triangle Classic Duke Right, Up, Down, Down, Triangle Classic Scarlett
Contributed By: bfprime.
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You can submit a problem report for any non-working or fake code in the lists above.