You will need two controllers for this to work. To copy cards without stopping at a card shop, you must first make three files:
The file with the cards you want copied.
A exact copy of the first file.
A fresh file. Right at the beginning.
Afterwards, go to Versus Mode and load the replica of the first file with controller one and go to BET. Once there bet the card(s) you want copied.

Then with controller two load the fresh, new file and go to BET. Now bet any card. Intentionally allow controller two to win. Now load file #1 with controller one and bet a card you don't want.

Now load file #3 and bet the cards won from in the previous battle. Intentionally let player one win and immediately after the battle and you will have a duplicated of that card with same EXP. Try this with a capture card and you'll be very happy.