CheatCodes.com has all the official Bust-A-Move '99 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 Tuesday May 21, 2013 for Bust-A-Move '99 are shown below. We also have this game on PlayStation, Nintendo64, and sometimes tricks from other game systems will also work on PlayStation.
At the main menu, press Circle, Left, Right, Circle. If you entered the code correctly, a small green face will appear in the lower right corner of the screen. Then, select puzzle mode and the "Arcade" option to access more puzzles.
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