Cheat Codes for Lego Star Wars:
Enter the following codes:

Play as a Battle Droid - On the start screen, Start, start, left, down, down, down, down, right

More speed for a while - While in the pause menu, press right, right, down, up, right, L.

Play as C-3PO - While paused, press start, start, left, down, right, up, right, right

See all the cut-scenes - While paused, down, up, R, L, R, R, R, down, down, up, down, down, select

Instantly gives a repair robot - While on the pause menu, press down, down, down, down, L, right, down, right, L

See Yoda quotes - While paused, Down, L, R, SELECT

Play as a Droideka - While paused, start, start, down, right, left, down, right, left.

Some random coins will be dropped near you - While on the pause menu, press L, L, L, right, left, R, R, R

Sheep Mode - While paused, L, R, L, down, up, R, R, right, left, down, right, right, select

Strange Colors - While paused, L - L - L - LEFT - LEFT - R - R - RIGHT - RIGHT - DOWN - DOWN - DOWN - SELECT

Play as blue Gungan - While on the pause menu: start, start, down, left, right, down, left, right

Play as Geonosian Wingged Guy - While paused: Start, Start, Right, Down, Right, Down, Left, Up

Play as a repair droid - While paused, start, start, up, up, up, down, down, down

Play as R2-D2 - While the game is paused press, Start, Start, Up, Up, Up, Up, Up, Up

Play as R4-P17 - While the game is paused press, Start, Start, Up, Down, Up, Down, Up, Down

Play as Droid on Hoversled - While the game is paused press, Start, Start, Down, Up, Down, Up, Down, Up

Play as General Grievous - While the game is paused press, Start, Start, Down, Down, Down, Down, Down, Down

Powerful Blasters - While the game is paused press, Down, Down, Left, Right, Down, L

Gives you 10 studs - Up, right, down, left, up, right, down, left, select

Changing the color of lightsabre, force and gun shots:
While in pause menu press each code for different color of lightsabre, force and gun shots

red color - L, R, R, start
black color- L , L, R, start
green color - R, L, R, start
blue color - R, R, R, start
Purple color - L, R, L, start
yellow color - R, R, L, start
Play as destroyer droid - start,start,left,up,right,down,right,up

Unlock Characters to buy in Freeplay:
Play throughout the game to unlock characters to buy in Freeplay mode.

Dooku - Complete Level 1 in Episode III
Jar Jar - Complete Level 2 in Episode I
Qui Gon - Complete Level 1 in Episode I
Chewbacca - Complete Level 2 in Episode III
R4-P17 - Complete level 3 in Episode III
Amidala - Complete Level 3 (Naboo City) in Episode I
Anakin - Complete level 1 of Episode II
Darth Maul - Complete Episode I in Story Mode
Yoda - Complete Episode II in Story Mode
Jango Fett - Complete Episode I, II, and III
Darth Vader - Complete Episode III in Story Mode
Tusken Raider - beat level 4 episode I
R2 D2 - beat level 2 Episode II
Clone Trooper - beat level 4 episode III
Obi Wan - beat level 5 episode III