USB Method
First make a character on your USB memory card. Now make a multiplayer game offline with your USB character and a character from another memory card. Give all the items you want duped to the USB character. Now connect the USB to your computer and select the PSO CHARACTER file and then click BACKUP. When you can choose the name make sure its PSO_CHARACTER. Now make another multiplayer game with your 2 characters from before. Give the items back to the character from a normal memory card. Now load the USB back up on the computer. Choose the character file and then click DELETE. Now go to UPLOAD and load the character save state you saved. When its on the card make yet another multiplayer game and now your USB character and your other character BOTH HAVE THE ITEMS. If you wish to dupe more of the same items give them back to USB character and repeat.

Lag Method
To Lag Dupe you must distinguish what kind of internet connection you have (56k, broadband, DSL) go to the bank and deposit your items and take them back out. Then leave the game type in your password and hit enter and you will have the bursting screen this is where you have to lag. (56k you can turn a phone on or pull cord out of gamecube a little bit) (broadband pull cord out of back of hub) (DSL pull cord out a little bit) Once the first save is over you may stop the lag by plugging the cord back in then once you load on pioneer 2 pull cord again to avoid the second save. Drop all your items then pull your memory card then plug the cord back in and wait to disconnect. When you come back your items will be in your inventory and on pioneer 2.

Meseta Dupe
Get to the point in the shop trick where you can walk around w/ the bank menu up.
Press START
select both "Items" and "Item"
select any item, when it says "yes/no" "remove/drop/sort", press B twice
select "Deposit and "Items"
select any item and "Item", press B once
select "Deposit" and your meseta on the left
select "Meseta" and "Drop"
press down once to select all your meseta in both options
press A
pick up all meseta off the ground and outta the bank and VIOLA! you just duped meseta......
thats what it sed on the topic that got deleted....and it works, I've done it, and I've never FSODed.......

Meseta Bank Stack
You must have working knowledge of the Shop Dupe trick posted above for you to do this.

Once you have the 'Deposit/Take/ screen up
Press Start
Then A
C-Down
Left Stick Up
C-UP
A
A
A
Left Stick Down
A

This will stack all of your meseta into your bank repeat to stack more

Multiple Dupe
first off deposit any meseta you have. Go to the shops and talk to the lady there until you get her to the armor shop. When she is close enough you will have the armor shop up and be talking to her. Hit A until her text is gone. Now hit to the left on the D-Pad 3-4 times and hit A. That will bring up the Item Shop. Now hit B, A. Now you can walk around with the armor shop up. Walk to the bank. When you get there make sure the armor shop says "What do you want to buy". Talk to the bank. Select Take and then Item. Choose the first item and it will say Yes or No. Now you hit B, B, A and now you can walk around with the bank up. Now make sure the bank is at the Deposit/Take screen (if not hit B until it is). When its there hit START. Select Item Pack and Deposit and then hit A. Now select Item on both menus and hit A again. One the bottom select the item you want to Dupe and hit A. Choose the options No and Drop. Now you will have the item on the ground. On the top menu now select that same item and choose Yes this time. !!!(press up so it says yes and sort then press the Z trigger
Now you can multidupe the item by pressing b until u get back to the main bank menu, which is take/deposit, take the item back out of the bank and get back to the main bank menu again and highlight deposit then press the Z trigger then highlight deposit(bank)+item pack (press a) at the same time and highlight item(bank)+items(item pack) (press A) at the sam time, now u should have 2 windows open select your item and highlight drop(item pack)+ NO(bank) (press A) then u highlight the item in the bank and say yes(bank)+sort(items)press a then u should have only 1 menu open saying automatically and manually then u press the Z trigger (DO NOT EXIT THE BANK!!) and go back to the main menu on the bank and start from the paragraph with the !!! above.