Hidden Passages
I found 2 secret passages in Hogwarts this is where they are:
1. The first one is nere the Fat Lady, when you reach the Fat Lady turn left, under the bookshelf is the passage.
2. The second one is in the study room near the Gryffindor Common Room,when you enter keep going right,under the bookshelf is the passage.
Note: In the passages are the chests with Wizard Cards in them,you will need certain spells to open them.
Technique
While duelling other wizards, or the gargoyle in the expelliarmus challenge, when you're sending the expelliarmus ball back, use Diffindo(cutting spell) on the foe. While he's jumping up and down saying "Ow! Ow!", then he won't be able to block the expelliarmus ball, and will lose a point. Do this a few times(you'll get the hang of it), and you should win.
How to defeat the Basilisk
First when you get in to the chamber of secrets and you have talked to thomas riddle the basilisk will come wait until it has gone into on the holes and walk into the sword which is to the left of you. The target the black diamond on the chest of the basilisk and press triangle, square or circle then with the analog stick move the charge to the diamond. Do this until the basilisk is defeat but be careful when you hit the basilisk it goes wild and stone starts to fall from the ceiling.
Aragog the Spider
Another tough boss is Aragog the Spider. Don't attack Aragog right away, first use Incendio to burn the web. Once you've burned enough webbing, Aragog will drop into the pit. In the pit, you can only hurt Aragog's soft belly. Dodge attacks and run around until it rears up - then blast it with second level spells. Use quick shots, don't stand still long enough to charge up. Hedwig drops sacks of power ups to help you. Use Flipendo to knock them out of the webbing so you can grab them. If that doesn't work, try using a giant can of bug spray!
Beat the Whomping Willow
When the Whomping Willow pounds the ground, hide in the corner where you entered the lair. When it stops pounding, lock on to the limbs and hit them quickly. Then lock onto the Willow's eye and blast it until your attacks stop damaging it. Watch for Hedwig dropping Cauldron Cakes and Beans to help you out. That should help you beat the Whomping Willow.
Personal Requests And Notice Board
The Notice Board in the Gryffondor common room usually gives a location, but higher up as you near completion they start to give vague clues, such as "Could be anywhere on grounds". With personal requests, they do not ever really give you a clue, except the first one. However, the items are near the area in about a two acre search range.
Finding Lost Items
When in doubt, check Hagrid's Hut. Many of the lost items end up there.
Fighting With Expelliarmus
When in one of the few battles with Hogwart's students (just the Slytherin Gang, all others leave you alone), let them make the first shot and bounce it back. Just as you do, use your Flapendo with a quarter to half second charge to knock them back, thus trapping them with two spells to knock back, which they can never manage. Note: Beware, just as you finish casting Flapendo (depending on distance), you will be forced to use your Expelliarmus almost instantly.
Expelliarmus Challenge
Use your spell that cuts down tapestries and ropes on the spiked ball. Walk up close to the edge and hold your trigger button (default R1), charge up for a half second and cast. Note: If you throw the imps into the fiery pits, they will die and you do not have to worry about them. Likewise, if you throw them all away you cannot put them into the cages to get out; but when all are indeed gone, they respawn from that hatch in the wall at the first ramp.
Easy Points
In the Chamber Of Secrets, destroy paintings on the wall. You will open the painting and get 100 points for Gryffindor. After returning from the Whomping Willow, head deep to your right when Professor Snape finishes scolding you. There, in a corner, you will find your first Notice Board Item. You can return it to the Notice Board before or after you go to the Restroom Shop the Weasley's set up, earning you the very first 10 points in the game, and possibly a Wizards Card.
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