Final Fantasy II Cheats

Firsly make sure you have the item you want to duplicate, and enter a battle and select the item option of the person with the item you wish to duplicate. Then Scroll down to a blank space on the item list and press A to place a glove there, scroll back up to the equipped items then press A on the one you'll be duplicating, then press B to leave the screen.

Next, hold the L and R buttons to run from the battle, press X to see the subscreen, select Equip and the character who has the item, press A on empty spot the item used to occupy, then press A on the actual item that's now in the items list. You will now see that your character has two of the selected item equipped.