Enter Right, Right, Down, Down, Left, Right, Left, Right, Left, Right, Start at the Rewards menu.
Easy Mini-Crests
You can get a large amount of Mini-Crests one time only, when you have used the Luck Potion and are making your way to Herbology. At this point, every time you use Diffindo to get the Mini-Crests to appear, you will get the full amount of Mini-Crests available, due to your luck. Get as many as possible at this point to help reach the 25,000 pieces goal.
Hogwarts Crest bonuses
Collect the indicated number of crests to unlock the corresponding bonus.
Bonus
How to unlock
Dungbombs in prank boxes around Hogwarts
21 Hogwarts Crests.
Even more health in duels
71 Hogwarts Crests.
Exploding Cauldrons in prank boxes around Hogwarts
48 Hogwarts Crests.
Love Potion in Potions Club
98 Hogwarts Crests.
More health in duels
8 Hogwarts Crests.
More mini-crests with each cast
129 Hogwarts Crests.
Score boost in flying events
38 Hogwarts Crests.
Two Player Dueling Pack 1
Draco and Luna
Two Player Dueling Pack 2
Crabbe and Goyle
Two Player Dueling Pack 2
Training Ground Dueling Arena
Two Player Dueling Pack 4
Paved Courtyard Dueling Arena
Two Player Dueling Pack 4
The Transfiguration Dueling Arena
Two Player Dueling Pack 5
Ginny and Hermione
Winning fights and duels
An easy way to win almost any fight or duel is to cast Levi Corpus or Petrificus Totalus. Then just charge your Stupefy until it chimes twice, then release it. It will result in a one hit victory until later in the game, then it will require two. Note: This does not work on Fenrir Greyback.
Use the following combo to defeat any enemy. Use Expelliarmus to knock them down. Charge up your Stupefy. While getting it charged, walk directly next to your dueling opponent. Fire your charged Stupefy for a one hit kil. This trick can give you 5 stars for the challenge very quickly and easily.
Castle Gates Arena...