CheatCodes.com has all the official Ben 10: Protector of Earth PSP 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 June 18, 2013 for Ben 10: Protector of Earth are shown below. We also have this game on PlayStation 2, Nintendo DS, PSP, Wii, and sometimes tricks from other game systems will also work on PSP.
Beat squidface at the meriles 3 times and you will get him in the null void.
Enter cannonbolt, heatblast, 4arms, heatblast.
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