Harry Potter And The Prisoner Of Azkaban Codes -

Secret chests:
Complete your collection of wizard cards to unlock the five secret chests on floor five. The first chest contains the Tea Leaf mini-game, which is playable from the main menu. The second chest gives you four or five good cloaks. The third chest gives you a Golden Snitch and levels up your party by one. The fourth chest gives you Spellotape A Charm for Hermione. The last chest levels up everyone in your party by two levels. The rewards can be used again each time you start the game over.

Harry Potter Wizard card:
Successfully complete the game to get the Harry Potter Wizard card. Use the card in battle to teach everyone in your party all possible spells and spell levels.

Tea Leaf mini-game:
Get all of the Famous Witches And Wizards Collectors Cards and go to the fourth floor. Five chests will be inside. One of them contains the Tea Leaf mini-game.

Wizard Cracker Pop-It mini-game:
After about three quarters of the way through the game, you will attend a dinner. You will play this game at this point. After you play it, the game will be unlocked on your mini-game menu.

Buckbeaks Hippogriff Guide mini-game:
After getting all five Monster Book Of Monsters, go back to Hagrid's hut. Hagrid will let you ride Buckbeak. After you ride him, this mini-game will be unlocked.

Ridikulus Boggart Challenge mini-game:
At some point you will attend Professor Lupin's Defense Against The Dark Arts class. You will face against a spider, Snape, a snake, and a mouse. After this, the mini-game will be unlocked.