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.
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.
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.