CheatCodes.com has all the official World Stadium 2 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 Thursday May 23, 2013 for World Stadium 2 are shown below.
At the title screen, hold L1 + R1 + Triangle + Start. Then, your character will be chased by a dog on the running course and will finish in first place. Now the bonus stadium will now be available.
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