CheatCodes.com has all the official International Superstar Soccer Deluxe PSX cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Sunday May 19, 2013 for International Superstar Soccer Deluxe are shown below.
At the title screen, press Up(2), Down(2), Left, Right, Left, Right, X + Circle. If you entered the code correctly, you will hear the sound of a dog barking. Then the referee and linesman will be dogs when the next match begins.
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