Enter the following codes at the Codes screen in the Options menu: 

Infinite Speed: CARDIOMAN
Unlock Chicago Skyline Court: WINDYCITY
No Trade Boundaries: GIMMETHAT
Simple Alley-oops: IGOTHOPS
Simple three-pointers: THREE4ALL 
Unlock Tiny Players: SMALLSHOES 
Unlock Volleyball: SPIKEIT 
Unlock Xbox Ball: BACHMAN
Unlock Beach Ball: SANDINMYSHORTS
Play With Soccer Ball: HOOLIGAN 
Play With ABA Ball: OLDSCHOOL 
Play With WNBA Ball: GOTGAME
Unlock 8-Ball: GAMEOVER