How do you make unlimited the stone of fa in fire emblem 6?

In Fire Emblem 6, you can make the Stone of Fa unlimited by using a glitch involving the game's item management. Specifically, you need to perform a series of actions with a character who has the Stone of Fa in their inventory, involving trading and item swapping during specific phases of the game. This glitch allows you to duplicate the stone, giving you an unlimited supply. However, keep in mind that exploiting glitches can affect your game experience and may not be enjoyable for everyone.