Final Fantasy II Cheats

After the fight with Golbez in King Giott's castle, he'll tell you to go to the tower of Bab-il. Right after he's done talking, use Rydia's warp spell and you will be transported into the crystal room. There will be a dark crystal there that you can take.

Find a battle, then go to items and select an empty space, and replace it with your weapon/shield. When you're done with both hands, fight and let another charecter put nothing in hand. Finish the battle and re-equip the weapons