Psp | Ys The Ark Of Napishtim Cheats

Does this game have the cheat code option? or extra content?

An untranslated menu will appear; press to select and view a movie. In-Game Unlockables Ys The Ark Of Napishtim Cheats Psp

: Finish the game on Nightmare difficulty to see a special image of Crevia during the credits. Essential Equipment & Items Many "cheats" are actually clever uses of in-game items. Does this game have the cheat code option