Second- To get unlimited items. You must have a W-item materia and at least two of whatever item that you want multiplied. Equiped the W-item and select the item you want to duplicate. Now use the item as you normally would. You should be able to use a second item now, select that item once again, but do not use it, unselect it. You should have one more of that item than you did before. You can keep selecting and unselecting untill you get a maximum of 99 of that item. For real money, use this code with an expensive item and you will never run out of money.

Third- Another code for money. This one takes patience. You need to gain an All Materia to Master. Then equip the new materia, and repeat the process. For every All Materia you earn more than 1 Million gil. After a few of the materia you should sell them. They are not very hard to gain if you have them equiped on a triple gain weapon or a double gain weapon, but make sure they are not on a no gain weapon. Also you can go to the area near Mideel after it is hit by the Ultimate Weapon and buy alot of Lightning Materia, then fight 5 battles and sell it. This will give you enough money to buy at least 2 more of them. If you repeat this process over and over again you will be rich quickly.