Enter the options menu and select "Gameplay". Hold D-pad Left +
Left Analog-stick Right and press Start. The "Codes" selection
will now be unlocked at the options menu.
Enter MEGASTARS as a case-sensitive code to unlock the Sega Sports,
Visual Concepts, and Team 2K2 in exhibition and street modes.
Enter DUOTONE as a case-sensitive code to have your player in color
with all other players in black and white.
Trash in the streets:
Enter SPRINGER as a case-sensitive code to see trash in the streets.
Note: This does not work in the gym.