LEGO Star Wars: The Video Game

Cheat: Unlock Characters
Enter the following codes in Dexter's Shop.

987UYR = Battle Droid
EN11K5 = Battle Droid (Commander)
LK42U6 = Battle Droid (Geonosis)
KF999A = Battle Droid (Security)
LA811Y = Boba Fett
F8B4L6 = Clone
ER33JN = Clone (Episode III)
BHU72T = Clone (Episode III Pilot)
N3T6P8 = Clone (Episode III Swamp)
RS6E25 = Clone (Episode III Walker)
14PGMN = Count Dooku
H35TUX = Darth Maul
A32CAM = Darth Sidious
VR832U = Disguised Clone
DH382U = Droideka
SF321Y = General Grievous
19D7NB = Geonosian
ZTY392 = Grievous' Bodyguard
U63B2A = Gonk Droid
PL47NH = Jango Fett
DP55MV = Ki-Adi Hundi
CBR954 = Kit Fisto
A725X4 = Luminara
MS952L = Mace Windu (Episode III)
92UJ7D = Padme
R840JU = PK Droid
BEQ82H = Princess Leia
L54YUK = Rebel Trooper
PP43JX = Royal Guard
EUW862 = Shaak Ti
XZNR21 = Super Battle Droid

Submitted by balkk_raider

Note these codes only unlocks characters in the shop; you still need studs to buy them.

Submitted by IndyHouse

Cheat: Unlock Extras
Enter these codes while in Dexter's Shop:

NR37W1 = Silly Blasters
L449HD = Classic Blasters
IG72X4 = Big Blasters
SHRUB1 = Brushes
PUCEAT = Tea Cups
LD116B = Minikit Detector
RP924W = Moustaches
YD77GC = Purple
MS999Q = Silhouettes
4PR28U = Invincible

Unlock Episode IV
Unlock the superkit (the Tantive IV model outside Dexter's Diner) by filling the Jedi bar while playing. This incidentally unlocks access to the mystery door.

Filling the Jedi bar is not a simple function of money, but also in grabbing all the pre-staged LEGO studs in each mission. Dying in a stage will reduce the Jedi bar (although once the bar is at maximum and pulsing, it cannot diminish).

In vehicular missions (particularly the pod race), the player needs to smash and destroy all the destructable objects to gain money. The invulnerability cheat ($1,000,000 in the shop) can help you get a full Jedi bar in most of the non-vehicular stages.