How do you get the dymphna furmage wizard card in Harry Potter and the Prisoner of Azkaban gba game?

To obtain the Dymphna Furmage wizard card in "Harry Potter and the Prisoner of Azkaban" for the Game Boy Advance, you need to reach the area called the Hogwarts Grounds. Specifically, you must use the spell "Revelio" near the large tree in the grounds to reveal the card. After using the spell, simply walk up to the card to collect it.