Harry Potter and the Goblet of Fire (DS)

Defeating Fire Salamanders
Hit the Fire Salamanders with Confundus (A). After you get the Aqua spell you can hit them with that and it will kill them immediately.

Fight a Voldemort:
Make every attack hit in 3-D mode and avoid his attacks. They do a lot of damage if they hit.

Game Cutscenes
Collect all 99 Tri-Wizard Shields.

Movie Photo Gallery
Collect all 74 collector cards.