1. Niffler - Fluffy black long-snouted creature (looks rather like a rat). Gentle & affectionate. Useful for finding treasure as they are strongly attracted to shiny objects. Have been known to attack humans wearing shiny jewelry (i.e. Umbridge)
2. Improper Use of Magic Office, or magical Law Enforcement Squad
3. Best at completing - the Underwater challenge. I love to swim, and took all but the last course to become a Certified LifeGuard before my family moved from California.
4. Worst at completing - the Maze. My sense of direction has always been very poor.
5. Potions - Wit Sharpening Potion
6. Veritaserum - Truth serum, it forces the person who has taken it to tell the truth to any questions asked, no matter who is asking - someone else or themselves.
7. Hungarian Horntail
8. "Potter Stinks"
Hermione & Viktor Krum
Harry and a Dragon