Start the game as usual, go to the Cheats menu and then enter one of the following codes: 

A11T3AM5 - All Teams Unlocked 
Z26BEXW8 - Micro Soccer 
WIMP A.I - Weak Opponents 
SPEEDY01 - Infinite Turbo 
MAXSKILL - Max. Skills 
GM2OPEN8 - All Game Modes Open 
5Y104D9A - Unlock The Streetballers Team 
E06J3CT5 - New Item Added To The Environment 

(C)PiZZADOX