Rebel Assault II Cheat Codes:
Skill/level Beginnner  Novice   Standard   Expert
2           Jabba      Ewoks    Bantha     Anakin
3           Endor      Chewie   Katana     Kenobi
4           Lachton    Dankin   Dengar     Fortuna
5           Borsk      Noghri   Pellaeon   Onmodon
6           Kroyies    Chamma   Ithull     Ommin
7           Auril      Bogga    Stenness   Ssrekkon
8           Kampl      Incom    Myrkr      Shazeen
9           Ferrier    Kothlis  Churba     Kiirium
10          Galia      Krath    Artoo      Gundark
11          Denarii    Siosk    Satal      Dianoga
12          Sadow      Adegan   Lobue      Atuarre
13          Onderon    Amanda   Denaba     Essada
14          Aleema     Ambria   Sturm      Paploo
15          Cathar     Sylvar   Crado      Nashtah
Finale      Dominus    Miraluka Carrack    Pestage
To activate Force Mode:
During gameplay, press ALT-V.  Then type LETGO.  
Press ESC to return to the game.
While in Force Mode:
+/-     Decrease damage/Increase damage
ALT-E   Extra life
ALT-L   Unlimited lives
To activate Yoda Mode:
While in Force Mode, press ALT-V.  Then type ISNOTRY.
While in Yoda Mode:
ALT-J   Level skip
ALT-P   Computer plays
ALT-M   View the cut-scenes
To activate Dark Side Mode:
While in Yoda Mode, press ALT-V.  Then type JOINME.
While in Dark Side Mode:
ALT-S   Super Pilot (Has passed all of the levels)
ALT-D   Debug mode toggle
ALT-C   Capture screen shot.