Harry Potter Fans With No Life

The students at the various schools have something akin to "learner's Permits" for their learning/attempts at Animagi, thus are not registered until they graduate. So, no, all Animagi aren't registered.



Who/what/where is Bathilda Bagshot and why do we know of this name?

She is the most outspoken advocate for Squib rights.



How were students able to identify members of the Inquisitorial Squad?

The Jackboots and arm bands were a dead giveaway.



Who keeps Hogwarts Castle clean?

Every student is expected to do their part with daily chores.





Who opened the Chamber of Secrets?

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Winky. She was looking for a place to store empty Butterbeer bottles.



How do we know that you don't have to be a witch, wizard, House Elf, or generally magical being to open The Room of Requirement?

We don't. All we know is that it can only be accessed if one has an empty bladder.





If one is capable of opening the Room of Requirement, what will be supplied in the room?

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Nothing. The room is vacant to students. Hogwarts provides for all the students' needs.



From where to Howlers originate?

Canada.



What kind of item is a/the Fwooper?

It is a traditional quidditch cheer.





What town did Hermione grow up in before she got her letter?

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Little Whinging; she lived right beside Harry growing up.



Why were the other centaurs upset that Firenze carried Harry on his back?