So the codes on here added by Sax, the fourth one down for each catogory works, however I can't seem to get any of the other to, I've managed to modify Firion's stats, but I can't seem to get any changes to Maria or Guy im using Epsxe emulator, would somebody be able to find HP/MP for Maria and Guy?

Here are the codes already submitted:
Final Fantasy Origins - Final Fantasy II (PAL-E) -GameHacking.org | Final Fantasy Origins - Final Fantasy II (PAL-E)

This is supposed to be Character 2 HP mod:
801F6CF2 270F but doesn't seem to work (wrong offset?)

if people wouldn't want to put the work in I understand, but could somebody let me know how to find the correct offsets? I tried using Cheat Engine on the emulator, found Maria's HP value, changing it did not change the value in game, and it reset within cheat engine upon opening the menu again.