Freestyle Street Soccer cheats and cheat codes for Gamecube

In Main menu go to "Extras" than "Codes" and you can type in the passwords.
If correct it will confirm at the bootom of the screen.

GM2OPEN8 - All Gamemodes
A11T3AM5 - All Teams
MAXSKILL - Max. Skills
Z26BEXW8 - Micro Soccer
E06J3CT5 - New Object in Inventory
SPEEDY01 - Unlimited Turbo
5Y104D9A - Unlock Streetballerteam
WIMP_A.1 - Weak Opponents

Tested on Pal-Version. Should work on NTSC too.