At the oversized LEGO box in Bricksburg, you can enter the codes below to unlock the corresponding character (who is otherwise made available over the course of the game and then unlocked using collected studs as payment).

Code	Effect
F3VG47	Abraham Lincolin
P4YX22	Cleopatra
FNHLTK	Emmet (Clown)
UOOAQY	Emmet (Lizard)
HJ4C21	Emmet (Pajamas)
NIHX2B	Emmet (Old West)
FXP9AN	Gallant Guard
OSSVNI	Green Ninja
A76DN7	Lady Liberty
K7TDXJ	Larry The Barista
KGJ4DU	Lord Vampyre
UP7HJQ	Mrs. Scratchen-Post
NG73OM	Panda Guy
FHNCD1	Prospector
GFH2F8	Robo SWAT (Laser)
31S3I5	Shakespeare
BID12F	Swamp Creature
BC2XJ5	Vitruvious (Young)
V4P96P	Yeti