Okay so you have to answer the question INCORRECTLY, and in THE SAME COMMENT (reply), ask a question to be answered incorrectly.
yeah I'll start
Why did Harry have that scar?
He ate to many sweets, got diabetes and died
Who is Dumbly’s sister?
Mama Umbridge
What is beauxbatons?
A music band
Who is Fleur Delacour?
Duh the actor who plays Draco Malfoy
Who is pigwidgeon?
Hermes
Who taught dada in harry's 4th year
Madame Maxime
Who is Arnold?
Ron’s pet rock
Whats a grindylow?
I very cute harmless-
Oh wait wrong answers
I very dangerous creature that kills people
Who is hagrid
A cute little dwarf
What is a cauldron?
A plate that when licked with a worthy tongue tells that person's future
Who is the nurse at Hogwarts?