Get all 70 purple beans and go to the portrait in the castle grounds.
Alternate Ending
When you have completed the game the credits will start to run these will continue for nearly 10 minutes.This will then finish and it will tell you truly who has one the Hogwarts House Cup and if have collected all 17 Famous Witches and Wizards cards it will give you an alternate ending.
Just before the troll, there is a long walkway. About halfway, go to the right-hand wall and keep pressing Square. When you have done this, you will enter a room full of Chocolate Frogs and a Save Book.
Control Main Menu
Press Triangle at the main menu to make a bolt of lightning.
Flipendo Duo
Get all 100 red beans and go to the portrait on the 3rd floor.
Nimbus 2000
Get all 50 yellow beans and go to the portrait in the foyer.
Quidditch Armour
Get all 80 green beans and go to the portrait in the dungeons.