Crest Roundup
You can find extra Crests when you've completed Harry Potter's adventure. At some places in Hogwarts you can find firework boxes. If you burn these with Incendio,they will explode and a broken Crest will pop out. Repair it with Reparo and pick it up. (For instance, check out the box nearby the duel club of Hufflepuf)

Hogwarts Crest Rewards
Description: Collecting the Crests hidden around Hogwarts unlocks the following rewards:

3 Crests	Two Player Dueling Pack 1: Draco & Luna
8 Crests	More health in duels
14 Crests	Two Player Dueling Pack 2: Training Ground Dueling Arena
21 Crests	Dungbombs in prank boxes around Hogwarts
29 Crests	Two Player Dueling Pack 2: Crabbe & Goyle
38 Crests	Score boost in flying events
48 Crests	Exploding Cauldrons in prank boxes around Hogwarts
59 Crests	Two Player Dueling Pack 4: The Transfiguration Dueling Arena
71 Crests	Max health in duels
84 Crests	Two Player Dueling Pack 5: Ginny & Hermione
98 Crests	Love Potion in Potions Club
113 Crests	Two Player Dueling Pack 4: Paved Courtyard Dueling Arena
129 Crests	More mini-crests with each cast
150 Crests	Dueling Two Pack: Snape

Locked Gates
How to: When you see the shields behind the locked gates, use Wingardium Leviosa and hit it into a wall to break it. Lift the pieces out through the gate and repair the pieces to get a shield.

Castle Gates
How to unlock: To unlock the Castle Gates multiplayer dueling area, enter this code at the Rewards Menu:

RIGHT, RIGHT, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, LEFT, RIGHT, START

All castle gates
To unlock the Castle Gates multiplayer dueling area, enter this code at the Rewards Menu: RIGHT, RIGHT, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, LEFT, RIGHT, START

Unlock Everything
This Code works on every console the cheat is Down left left left left left down down right down left

Dueling
Levicorpus then max charge while walking up to oppenant then cast and you win

Dueling
When you're dueling the easiest most quickest way to defeat the oponent is by doing expelliarmus and then when they fall to the ground keep on doing stupefy and when they get back up do expelliarmus and keep on doing that until you defeat the oponent. It's an easy way of defeating your oponent with out losing health.

Duel Hint
Forget about all the combos and spell series. Just go all out with Stupendo on your opponent.(u cant hit early with a levicorpus or expelliamus. they dodge. aarrrghh). WHen they try to purtego and deflect it, they'll be fairly unsuccessful. Now, when theyre busy doing that, just do a levicorpus or expelliamus and get close and start doing relentless stupendos. Finally, finish with a charged stupendo. Easy isn't it? It is.

Funny thing
When you are controlling Ron and follow Harry, somethimes when you stops, Ron will dance!

Easy duels
When Harry in the duels, first, do the stupefy 3 times then do the expelliarmus spell when he falling on the floor. And finally, use the R3 button to hold down to become big lights and let go to shoot 6 stupefy spells and you win now. Good luck!^_^

Duel Winning Combos
1. Combo: 1 Expelliarmus, 4 Stuppefy, 1 Levicorpus, Max Charging attack, Then Stuppefy Many times

2. Combo: 5 Stuppefy, 1 Levicorpus, Max Charging attack, 1 Petrificus Totalus

3. Combo: 1 Petrificus Totalus, 1 Expelliarmus, 5 Stuppefy, 1 Petrificus Totalus

EASY DUEL HINTS FOR DEATH EATERS:

1. Combo: 3 Petrificus Totalus

2. Combo: 7 Stuppefy, 1 Petrificus Totalus, 1 Levicorpus, Max Charging attack

3. Combo: 1 Expelliarmus, Medium Charging attack, Then (listen carefully!) Charge to max then wait to the Death eater attack with some Curse. the relase it then Harry use a really powerfull protego what hit back the curse, then you can do anything

Best dueling combo (More Greats)
Cast Levicourpus, you're opponent should be suspended in the air. If you're fast enough, you should be able to charge Stupefy (first 'burst' stage) three times. Or, for more damage, super charge Stupefy (second 'burst' stage) once, then single charged stupefy once more.
So options: [x - charged]
1) Levicourpus 3) x1 Stupefy
1) Levicourpus 1) x2 Stupefy 1) x1 Stupefy

Attacking
When attacking try casting expelly armous then stupify over and over

PS2 Cheats for Harry Potter and the Half-Blood Prince

Harry Potter and the Half-Blood Prince cheat codes

Harry Potter and the Half-Blood Prince cheats