Harry Potter and the Prisoner of Azkaban

Easy Beans:
You can get lots of beans and Wiggenweild Potions in Fred
and Georges bathroom. Play as Ron and go to the back room.
Go up to the robes and press X for both sides. Beans and
sometimes Wiggenweild Potions will appear. Go through the
secret wall, then go back to Fred and Georges. Go to the
robes and do the same thing. Keep going back and forth
and you will have plenty of beans. Also when using Harry, Hermione,
or Ron, fire your attacking spell at a bush. A bean will appear.
Continue to do this as many times as desired.

Unlimited Every-Flavored Beans:
Using Ron, you can discover Bertie Bott's Every-Flavored Beans
in bookcases. Using this logic, this is how the trick works.
First, enter a huge room with many bookcases (usually a study area.)
Pick out the beans (or occasionally dungbombs) from them, and
then exit the way you came. Enter once more, and you will be
able to reap the beans again, even though you already did!
This is an effective technique for gaining unlimited beans.

Free Wiggenweld and Antidote Potions:
When you are exploring the Hogwarts grounds, you will every
once in a while encounter a bush. When you see one, move up
close to it and shoot Flipendo at it. Either a jelly bean,
antidote potion, or wiggenweld potion will pop out. Pick it
up with the character of your choice.

 