Because Harry potter is alergic to vampires who are 125year old virgins. Also Vampires are alergic to people with scars
Gilderoy Lockhart, a fictitious character and DADA teacher, wrote a book entitled Voyages with Vampires. The book was only mentioned in Harry Potter and the Chamber of Secrets.
No Harry Potter doesn't have any sibling's.
There are about 50 vampires in the twilight series and twilight is the best movie in the world (better that Harry Potter).
It depends on what you like. Twilight involves romance and vampires while Harry Potter is about magic. If both sound appealing, then read both!
Harry Potter does not have any brothers or sisters.
There is no janitor in Harry Potter at any time.
No, only the Basilisk in Harry Potter is in the second book/movie Harry Potter and the Chamber of Secrets.
Harry Potter will appear in the Harry Potter books. If he was to appear in any other published novel it would violate copyright.
No, nor was she in any of the Harry Potter movies.
No, owls cannot talk. Even in Harry Potter.
No, Toby Hemingway is not in any of the Harry Potter films.