CheatCodes.com has all the official King Of Fighters KYO 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 Wednesday June 19, 2013 for King Of Fighters KYO are shown below.
Complete the Asia Chapter with Kyo at level 10. Then, highlight Chris at character selection screen and press L1 + L2 + R1 +R2. Now all characters, including Orochi will be selectable.
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