Harry Potter and the Goblet of Fire - Platform: Gameboy Advance

Movie photo gallery:
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Get all 74 collector cards.

Cutscenes:
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Get all 71 Tri-Wizard Shields.

Walk on walls:
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During your first "Dark Against The Arts" class, you will learn "Reparo". 
You will be in a room for testing only when you learn that spell. 
Do not use Reparo on anything in the room. If you use Reparo to get on 
the cabinet, when you get back down you will find that you can walk on 
walls and out of the screen. However, you cannot get any farther and must 
start from the beginning.

Moody's challenge:
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When reach Moody's challenge after the second task, he will ask you to 
face creatures that you already know of, and to not repeat spells that 
you have already used. Immediately after you complete Moody's challenge 
you will go to the third task. You can then defeat Voldemort after the 
third task.