1. Win the quiditch cup.
2. Win the house cup.
3. Obtain all 101 wizard cards.
4. Complete all the lost and found quests.
5. Get distinctions (or the best) grades on everything.
6. Never lose any house points.
7. Cause slytherin to get the least ammount of house points. (which means as goyle you need to get caught in the library until you lose the maximum points.
8. Card dupes aren't needed for 100% (this means you dont have to go to gringots which would require a gameboy link)
9. All 3 potion vials.
10. All the equipment upgrades like the bean expansion, balloon expansion, and stink pellet expansion

Some of these may sound ridiculous, but if you lose points you don't necessarily have 100% of the points. Plus I don't even know if gringots is in the other versions. If you were Harry Potter wouldn't you want slytherin to get as low of an amount of points as possible?

Added the category and the rules.

Thanks FrankerZ