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Lego Harry Potter - Years 1-4

Cheat mode:
Once the Leaky Cauldron hub area is unlocked, enter Wiseacres Wizarding
Supplies in Diagon Alley before starting actual game play. Go upstairs,
talk to the vendor, and enter one of the following codes to activate the
corresponding cheat function:

Password   Effect
QE4VC7 - Gold Brick 01 
FY8H97 - Gold Brick 02 
3MQT4P - Gold Brick 03 
PQPM7Z - Gold Brick 04 
ZY2CPA - Gold Brick 05 
3GMTP6 - Gold Brick 06 
XY6VYZ - Gold Brick 07 
TUNC4W - Gold Brick 08 
EJ42Q6 - Gold Brick 09 
GFJCV9 - Gold Brick 10 
DZCY6G - Gold Brick 11 
AUC8EH - Carrot Wands 
H27KGC - Character Studs 
HA79V8 - Character Token Detector 
T7PVVN - Christmas 
4DMK2R - Disguise 
J9U6Z9 - Extra Hearts 
ZEX7MV - Fall Rescue 
Z9BFAD - Fast Dig 
FA3GQA - Fast Magic 
84QNQN - Gold Brick Detector 
TTMC6D - Hogwarts Crest Detector 
F88VUW - Ice Rink 
QQWC6B - Invincibility 
7AD7HE - Red Brick Detector 
89ML2W - Regenerate Hearts 
H8X69Y - Score x10 
74YKR7 - Score x2 
J3WHNK - Score x4 
XK9ANE - Score x6 
HUFV2H - Score x8 
HZBVX7 - Silhouttes 
BMEU6X - Singing Mandrake 
67FKWZ - Stud Magnet 

Password   Effect
VE9VV7 - Accio 
QFB6NR - Anteoculatia 
6DNR6L - Calvorio 
9GJ442 - Colovaria 
CD4JLX - Engorgio Skullus 
MYN3NB - Entomorphis 
ND2L7W - Flipendo 
ERA9DR - Glacius 
H8FTHL - Herbifors 
YEB9Q9 - Incarcerous 
2M2XJ6 - Locomotor Mortis 
JK6QRM - Multicorfors 
UW8LRH - Redactum Skullus 
2UCA3M - Rictusempra 
U6EE8X - Slugulus Eructo 
UWDJ4Y - Stupefy 
KWWQ44 - Tarentallegra 
YZNRF6 - Trip Jinx

Trophy room:
Go to the Leaky Cauldron after you have learned Reducto, and destroy the
piece by the stairs (it will flash blue). Jump down, and you will be in
a room with four areas dedicated to each year. You must collect all Gold
Bricks for each level to build whatever it makes. -From: Ashley Pugh

Easy Ghost Studs:
Enable the "Ghost Stud" extra option. When Nearly Headless Nick is
floating and not moving, stand underneath him to keep getting Ghost Studs.

Destroying red sparkling objects:
To destroy objects with red sparkles around them, you must use Dark
Magic. In order to use Dark Magic, you need to use the Polyjuice Potion
or an evil character (for example, Barty Crouch Jr., Lord Voldemort, or
Tom Riddle) in Freeplay mode. An evil characters' Wingardium Leviosa
spell is changed to the Crucio Curse and can destroy the red sparkling