Harry Potter and the Prisoner of Azkaban

Permanent shield:
While you are in the extras menu, select "Dueling Club". After you select
a team, begin dueling. During the duel, press your Expelliarmus spell two
times in a row and hold the button. Then, reflect an oncoming spell.
You should keep your shield up no matter what, even when the button is
released. You can also walk around, and if you are struck in the back,
the spell will go through you, and in the direction that the shield is
pointing.

Complete the following sets of cards to unlock the corresponding bonus:
Beasts           - 20 House Points.
Classical Beasts - Ron gets extra endurance.
Dragons          - Ron gets extra endurance.
Giants           - 20 House Points.
Goblins          - 20 House Points.
Hags             - Hermione gets extra endurance.
Quidditch        - Harry gets extra endurance.
Vampires         - 20 House Points.
Witches          - Hermione gets extra endurance.
Wizards          - Harry gets extra endurance.

 