Johnlock AU where Sherlock and John are attending Hogwarts School of Witchcraft and Wizardry (post battle of Hogwarts) quite a bit of parallelism with BBC's Sherlock

When John is sent off to Hogwarts and befriends a strange boy named Sherlock Holmes, a fellow student, Carl Powers, dies, and Sherlock thinks it is suspicious. Together, Sherlock and John solve crimes at Hogwarts until their last year. Johnlock, Mystrade, and a bit of MorMor. Rated T for violence and certain johnlocky moments ;)

John Watson had always hated Sherlock Holmes, but then again people change. Thing change when John and Sherlock are assigned as potions partners, they don't hate each other any more. They both feel something different, but what is this feeling. Johnlock Fanfic Hogwarts AU

In which Sherlock Holmes is rumored to be the next Harry Potter (or Voldemort) and where John Watson, a normal Hogwarts student, might not seem so normal in the presence of a certain boy genius. Split in two parts. Eventual Johnlock. Rated M for non-graphic mentions of mature themes.