Enter these codes at the Codes menu in the cantina (at the bar) in Mos Eisley to enable the corresponding effects in the game.
Unlock Admiral Ackbar:
Enter the code ACK646
Unlock Battle Droid Commander:
Enter the code KPF958
Unlock Boba Fett (Boy):
Enter the code GGF539
Unlock Boss Nass:
Enter the code HHY697
Unlock Captain Tarpals:
Enter the code QRN714
Unlock Count Dooku:
Enter the code DDD748
Unlock Darth Maul:
Enter the code EUK421
Unlock Disguise:
Enter the code BRJ437
Unlock Droid Tri-Fighter:
Enter the code AAB123
Unlock Ewok:
Enter the code EWK785
Unlock General Grievous:
Enter the code PMN576
Unlock Greedo:
Enter the code ZZR636
Unlock Imperial Guard:
Enter the code GUA850
Unlock Imperial Shuttle:
Enter the code HUT845
Unlock Jedi Grapple Move:
Enter the code CLZ738
Unlock Ki Adi Mundi:
Enter the code MUN486
Unlock Luminara:
Enter the code LUM521
Unlock Padme:
Enter the code VBJ322
Unlock Recolored R2D2:
Enter the code EVILR2
Unlock Taun We:
Enter the code PRX482
Unlock Tie Interceptor:
Enter the code INT729
Unlock Tie Fighter:
Enter the code DBH897
Unlock Stormtrooper:
Enter the code NBN431
Unlocks IG88:
Enter the code GIJ989
Unlocks Jango Fett:
Enter the code KLJ897
Unlocks the Vulture Droid:
Enter the code BDC866
Unlock Watto:
Enter the code PLL967
Unlock Zam Wesell:
Enter the code 584HJF
Unlock Zam's Speeder:
Enter the code UUU875
Unlock Indiana Jones
This hidden character is unlocked by going to the Bonus Room at the Mos Eisley Cantina and watching the Lego Indiana Jones trailer. When you have viewed the trailer you can then buy him at the shop for $50,000.