If you ask me, this has always been the weakest part of the series. Never really liked the game as much als the first two.
With this table, you can edit all character stats, let items spawn in inventory and teleport party through editing the x/y coordinates.
But: the editing feature only works after loading the game. So edit the party to your liking, boost Experience, give the characters better equip. Then save the game in a new slot and enjoy. Because out of a sudden the game will change all the addresses.
Of couse we have an invulnerability cheat. This one changes the code and so it does not require a freshly started game like the editing feature
have fun,