Note: Try to get them in the following order:
1. Have the Puffeskin eat bushes at the Burrows.
2. Get a score of 800 or more points when de-noming the Weasley's garden.
3. When trying to find Ginny, go the way Ron did not. Keep going until you have to knock down a tree. Go across and go left. Then, get the crates in the correct location and the card is yours.
4. When at the second part of driving the car (when you can replenish your health), go through a tunnel to the right and get the card.
5. Inside the bookshelf under a portrait where Colin tries to take a picture of you.
6. In the library behind a secret bookshelf.
7. From Fred and George (for 50 beans).
8. From Fred and George (for 50 beans).
9. From Fred and George (for 50 beans).
10. From Fred and George (for 50 beans).
11. From Fred and George (for 50 beans).
12. Hufflepuff dueling champion.
13. Ravenclaw dueling champion.
14. Inside a strange colored wall when you are almost to the Front Hall.
15. In the Gryffindor common room after earning all the Herbology and Defense Against The Dark Arts cups.
16. Get 800 points or more when de-noming Hagrid's garden.
17. Inside a bookshelf near Moaning Myrtle's bathroom.
18. Inside a bookshelf in the Knights room.
19. A bookshelf on the left side of the stairs near the Defense Against The Dark Arts class.
20. The Private lesson with Lockhart, if you achieve an A grade.
21. In the Dark Forest.
22. Inside the bookshelf near Lockhart's office.
23. Inside the bookshelf near the Gryffindor common room.
24. Sltherin dueling champion.