Cheat menu:
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.
Bonus teams:
Enter MEGASTARS as a case-sensitive code to unlock the Sega Sports,
Visual Concepts, and Team 2K2 in exhibition and street modes.
Muhammad Ali and Michael Jackson:
Press Start and hold L during an exhibition game. The screen should
shake to confirm correct code entry. Go onto the Sixers and they
should be on the starting lineup.
Airball:
Select "Street" at the main menu. Press White, then hold L and
press Y(2). Press Start and "Airball" will appear to confirm
correct code entry.
Sites: