At the 'Codes' screen under 'Settings' enter the following codes:
Unlock ALL Arenas:
TANTIVEIV
Unlock ALL Bonus Stages:
NARSHADDAA
Unlock ALL Duel Characters:
ZABRAK
Unlock ALL Powers and Moves:
JAINA
Unlock ALL Story Stages:
KORRIBAN
Unlock Infinite Force:
KAIBURR
Unlock Infinite Health:
XUCPHRA
Unlock Quick Health & Force Regain:
BELSAVIS
Unlock Super Saber Mode:
SUPERSABERS
Unlock ALL Movies:
COMLINK
Unlock ALL Concept Art:
AAYLASECURA
Unlock Tiny Droid Mode:
071779