LEGO Star Wars II: The Original Trilogy (PS2, Xbox, Xbox 360, GameCube, DS, PSP versions)

Unlimited studs
(Note: you will need to be playing multiplayer) In a double score zone (one in each level), kill each other. You should lose 2,000 studs but if you collect all the dropped studs you should get 4,000 studs giving you a profit of 2,000 studs. You can do this as many times as you like.

Unlock codes - type these into the Cheat Entry screen at the Mos Eisley Bar and you'll be able to buy them for Free Play mode:

NXL973 - IG-88
MMM111 - Imperial Guard
TTT289 - Ewok
YZF999 - Gamorean Guard
NFX582 - Gonk Droid
UCK868 - Beach Trooper
BEN917 - Ben Kenobi's ghost
VHY832 - Bespin Guard
WTY721 - Bib Fortuna
HLP221 - Boba Fett
SMG219 - Grand Moff Tarkin
YWM840 - Hooded Han Solo
BNC332 - Death Star Trooper
VAP664 - Imperial Shuttle Pilot
UGN694 - Ugnaught
BBV889 - Imperial Officer
CVT125 - Imperial Spy
UUB319 - Lobot
HHY382 - The Emperor
EKU849 - Rebel Trooper from Hoth
GBU888 - Skiff Guard
NYU989 - Snow Trooper
PTR345 - Stormtrooper
HDY739 - TIE Fighter
NNZ316 - TIE Fighter Pilot
QYA828 - TIE Interceptor
SGE549 - Palace Guard
CYG336 - Rebel Pilot

Gold Brick unlocks
8 gold bricks = IV Bonus (build the doorway in IV hangar)
16 gold bricks = V bonus (build the doorway in V hangar)
32 gold bricks = VI bonus (build the doorway in VI hangar)
60 gold bricks = Lego City (build the doorway outside the cantina)
99 gold bricks = Lego Stud Fountain (build it outside the cantina)

Get Dancing Gammorean Guard
When you are a Gammorean Guard press the circle button and he will start playing air guitar.

Watch Leia dance
When playing as gold bikini-clad Princess Leia in Mos Eisley, hold circle and she'll dance for you. Jump on a table for the full (surreal) effect.

Want more LEGO Star Wars II Cheats? Of course you do. Head here for Leia and Han antics.