Harry Potter and the Prisoner of Azkaban

If you get poisoned by a Doxy and run out of Antidote to Uncommon Poisons, drink two Wiggenweld Potions. The game recognizes that you’re still poisoned after the first Wiggenweld, but not for the second.

Each character (Harry, Ron, and Hermione) has a special ability. Use Ron to find hidden passages. Use harry to jump long gaps. Use Hermione to crawl under small spaces. This is useful when getting spellbooks or escaping Trolls and Prefects.

Successfully complete the indicated card set to unlock the corresponding bonus:

Extra Endurance for Harry: Successfully complete the "Quidittch" card set.
Extra Endurance for Harry: Successfully complete the "Wizards" card set.
Extra Endurance for Ron: Successfully complete the "Dragons" card set.
Extra Endurance for Ron: Successfully complete the "Classical Beasts" card set.
Extra Endurance for Hermione: Successfully complete the "Witches" card set.
Extra Endurance for Hermione: Successfully complete the "Hags" card set.
20 House Points: Successfully complete the "Beasts" card set.
20 House Points: Successfully complete the "Giants" card set.
20 House Points: Successfully complete the "Vampires" card set.
20 House Points: Successfully complete the "Goblins" card set.

You will first come in contact with Hinkypunks on the same level with the Goul. Hunkypunks are ghost-like creatures with one foot and a lantern. To defeat them, have Ron shine Lumos Duo in their faces. When they become solid and zombie-like, finish them off with Flipendo.

When fighting the fire armor thing when you just got Glacius, to avoid the shooting fire rocks when he opens up, stay directly in the middle. You should be able to avoid almost all of them. Start with Flipendo until he opens his mouth, then use Glacius until he sort of explodes (this does not mean that he is defeated). One of his arms will come off. Use Glacius to put out the fire, then use Flipendo to destroy it. Repeat until he is defeated.