Successfully complete the indicated task to unlock the corresponding trophy:

Characters Cup: Meet all 58 characters in Hogwarts.
Defence Against The Dark Arts Cup: Cast all defensive spells in six duels.
House Ghost Cup: Find all four House Ghosts.
Nature Trail Cup: Find all animal footprints.

After you complete Professor Flitwick's mini-quest, the Charms room will become unlocked. Go inside and talk to him. He will call out spells that you need to cast on certain objects. If you pass and get an "Outstanding", it counts it in the Room Of Rewards. The order he calls the Charms in is as follows:

1. Wingardium Leviosa: Use it on a bench.
2. Reducto: Use it on a statue of a bird.
3. Reparo: Use it on the pile of broken dishes.
4. Accio: Use it on a rope near the fireplace.
5. Depulso: Use it on a chair.
6. Accio: Use it on a rope near the fireplace.
7. Incendio: Use it on the plaque.
8. Reducto: Use it on a statue of a bird.
9. Reparo: Use it on the pile of broken dishes.
10. Wingardium Leviosa: Use it on a bench.

In the Entrance Courtyard. Use Wingardium Leviosa on the broom and sweep the leaves on the right side of the courtyard.

In the Great hall on the table.

In the Viaduct Entrance in front on the bookcase next to the stuttering portrait.

In the Clock Tower Courtyard directly in front of the Fountain.

In the Library on the table.

In the courtyard where Dean is standing.

The spiral staircase when you walk up to DADA.

In the Viaduct.

The fourth floor outside in the balcony.

In the Paved Courtyard. You must repair the broken staircase in the corner. It is at the end of the balcony in the corner.

Note: You can use Incendio on Talking Gargoyles for Discovery Points.

The following flying creatures must be found for the Room Of Rewards:

Bats: Can be found below the Stone Bridge. Go to the Stone Bridge and light all the torches with Incendio. Then, climb down the pipe shown and maneuver your way to the bottom. You will discover the bats.

Crows: Can be found at the Stone Circle.

Doves: Can be found at the bridge at the Viaduct.

Pixies: Can be found in a desk in the Defense Against The Dark Arts room.

Seagulls: Can be found at the boathouse.

When you are outside, look for small patches of grass on or near pathways. If they flash when you walk by them with your wand out, try casting Accio on them. A hidden Fred and George Parcel may appear. You can find these most commonly in the Stone Circle and behind Hagrid's Hut (including the pathway into the woods).