Here are the cheats:
a minor inconvenience (beat minor circuit)
ground control to major tom (beat major circuit)
super nintendo is the best (beat super circuit)
not my type (unlock all archetypes)
I need better arsenal (upgrade all moves from the shop)
personas per se (unlock all the shopkeeper's personas)
Honorine is generous (unlock all potions)
hp and stats please (gain maximum hp and stats upgrades)
show me your moves (unlock and upgrade all moves from the shopkeeper's personas)
permit me to have the permits (unlock the permits for spell use in the gallery)
list of cheats (show a list of more cheats that are not all listed here)
You can also enter "full gallery", "full Hono", or "full persona" for some eye candy or enter "sex" when safe mode is on.
Hope you enjoy!