Arc the Lad Collection Cheats

Alright, in order to do this you will need the following.

Two Arc the Lad II saves with Lieza in your party.
Arc Arena game disc.
Memory card x2.

(Assuming Player 1 is receiving the item you wish to duplicate.)
Alright control player 2, then head to the item trading shop. Once you are there have player 2, give player 1 the item that you want to duplicate. Once this is done head to the Arena and talk to Sania make player 1 save, and make player 2 load. You now have two of the item you duplicated. (Note: You will have to get the item you duplicated off player 1's inventory.)