To enter the codes, go to the options screen, select "Codes" and enter the code.
Repeat the code to disable its effect.

 Effect:                        Code:
--------------------------------------------
 Unlimited turbo:               SPEEDY
 Small players:                 ITSYBITSY
 Disable trade rules:           DOIT
 Unlimited created
 player points:                 MOMONEY

 More three pointers:           THREE4ALL
 More alley-oops:               DUNKONYOU

 Skyline court:                 CITYHOOPS
 Select "Single Game" and choose any arena to play on the Skyline court.

 ABA basketball:                STYLIN70S
 WNBA basketball:               WEGOTGAME
 Soccer ball:                   KICKME
 Volleyball:                    SPIKEIT
 Beach ball:                    BEACHBUMS
 8-ball:                        CORNERPOCKET
 Xbox ball:                     XBALL

 Bonus players:                 PEEKABOO
 Enter the player creation screen and enter current NBA player names such as the
 following persons to unlock classic versions of them.

  Hakeem Olajuwon
  Karl Malone
  Michael Jordan
  Patrick Ewing
  Reggie Miller
  Scottie Pippen
  Shawn Kemp

 You can also enter most of the names of the development team (found on the
 last page of the instruction manual) to unlock them as bonus players.