Enter the following codes at the Cheats screen:
Unlock Elvis Outfits: Y, Black, White, Black, Black, White, L, Black
Unlock Easy Steals: R, X, X, X, R, Black, Y, White
Unlock Easy Blocks: R, Y, Black, White
Unlock Santa: Black, White, Black
Unlock Brick City Clothes: R, Black, R, L, Y, X, R, L
Unlock Court Select Ball: Black, Y, X,Y, L, Y, X, X
Unlock Normal Ball: R, X, X, L
Unlock Cowboy Outfits: Y, White, White, R
Unlock Pimpin Outfits: R, X, Y, Black
Unlock Clown Outfits: X, L, X, Y
Unlock Kung fu Outfits: Y, Y, X, L
Unlock Tuxedo Outfits: Black, Black, Y, X
Unlock RWB Ball: Y, White, X, White
Unlock Black Ball: White, White, Y, Black
Unlock Power game: White, Y, Black, Y
Unlock Xzibit:
Finish the Lord of the Court Challenge at Venice Beach
Unlock Silk the Shocker:
Finish the Lord of the Court Challenge at Shakespeare Park
Unlock Half Man-Half Amazing:
Beat the Urban Hitmen in the World Tournament Mode
Unlock DJ Mugz, Cypress Hill, Bobo:
Beat Tournament Mode on "Greatest of All Time" difficulty
Unlock Lil' Romeo & Master P:
Spend several thousand dollars in gear at the Foot Action store and they will appear outside the store
Easy Money:
In world tournaments mode bet all your money on dunks. Then during the game only perform dunks. Even if you lose you'll get double the money.