Final Fantasy II 01A6F244 - First, put an item in the first slot in the item screen. Then, cure or heal the middle guy. When you do, the item in the first slot will become another item. Do this and go through all the itemsin the game.
038532BD - Infinite Magic
03CAE6BD - Infinite Hit Points
03ED4E01 - Tons of items and experience code
03EE21EE - Gain 65,000 exp. points after battle, plus the normal exp.
01C702AD- 01C707AE - Infinite Gold