Use the following cheat codes to enable the corresponding effect:
Unlock Greedo: NAH118
Unlock Tusken Raider: PEJ821
Unlock Jawa: JAW499
Unlock Sand Trooper: YDV451
Unlock Beach Trooper: UCK868
Bespin Guard: VHY832
Bib Fortuna: WTY721
Ewok: TTT289
Han Solo: YWM840
Imperial Shuttle Pilot: VAP664
Lobot: UUB319
Ugnaught: UGN694
TIE Fighter: HDY739
TIE Fighter Pilot: NNZ316
TIE Interceptor: QYA828