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Playstation 2 - Graffiti Kingdom cheats

Finish the game and select versus mode.  While selecting the 
Vs.Bosses option, enter the following button combinations code:

Unlock Fake Pastel: Hold L2 + R1 
Unlock Fake Pixel: Hold L1 + L2
Unlock Pastel: Hold L1 + R1
Unlock Play as Pixel: Hold L1 + R2