Various cheats

Unlock Codes Entry Screen:
     In  the  "Options"  menu select "Game Play". Press and hold D-pad
Left AND Left Stick Right (Move the Left stick to the Right) and press
Start.  The  "Codes"  selection will now be available at the "Options"
menu.

Unlock NBA 2K2, Sega Sports, and Visual Concepts Teams:
     Enter  "MEGASTARS"  as a case-sensitive code in the "Codes" entry
screen.

Unlock Muhammad Ali and Michael Jackson:
     During  an  exhibition  game  press  Start and hold L. The screen
should  shake  briefly to confirm correct entry. Now MJ and Ali are on
the Sixer's starting lineup.

Airball:
     Select "Street" option at the main menu and press White then hold
L and press Y, Y. Now press Start and "Airball" will appear to confirm
correct code entry.