For those curious, here's the Gameshark codes I used (on the English (E) ROM).
Master Code + All Cards (Press L+R before entering the Deck Construction menu)
- 03808074 ebafd7e2
- 94000130 000000ff
- d5000000 33333333
- c0000000 000000c1
- d6000000 02105bb0
- d2000000 00000000