Cheat Codes Wanted

As many here probably already know, I'm quite fond of using Gameshark with frustrating games, or games I simply just want to get to the end of sometime BEFORE THE END OF THE CENTURY. Or, like, at all.

Unfortunately, Gameshark doesn't have all the codes for the games I want, so I'm wondering if there are other devices that offer cheat codes for the following:

Ar-Tonelico 2
Eternal Poison
Mana-Khemia 2
Persona 3 FES
Persona 4

I'm looking for codes for max and infinite stats, so I can bypass random battles and level-building altogether, and take care of boss battles in a manner of seconds, just so I can pay attention to the setting, plot and music.

Any help?