Makai Senki Disgaea Portable Cheats - PSP

Etna Mode
There is a hidden mode in Disgaea Portable called Etna mode. Normally you have to get this mode by going through the game and reading Etna's diary every chapter, but you can unlock it instantly by entering the following code during the title screen, with the pointer on "New Game." If you're successful, you'll hear Etna's voice.

[Triangle], [Square], [X], [Triangle], [Square], [X], [Circle] - Unlock Etna Mode