One prank that's quite common in fanfiction is when students bewitch the stairs to move in unexpected ways, like turning into slides or leading to wrong floors. This causes a lot of confusion, especially for first - years. Also, there are pranks where students use transfiguration to change the appearance of teachers' desks into something ridiculous, like a giant cake or a pool of slime.
The Weasley twins, Fred and George, are often the main instigators of pranks in Hogwarts fanfiction. They have a natural knack for mischief and are always coming up with new and creative ways to cause chaos in the school. Their products from Weasleys' Wizard Wheezes also play a big role in the pranks they pull.
In the 'Harry Potter Pranks Everyone' fanfiction, there could be some hilarious pranks. For example, a student might use a charm to make the Great Hall's ceiling show embarrassing memories of the teachers. Another prank could be to magically swap everyone's voices, so that when they talk, it comes out as someone else's voice. There could also be a prank where the Hogwarts Express gets diverted to a completely different location, and the students end up in a strange magical place full of odd creatures and unexpected challenges.
A really funny prank could be where a student's quill is jinxed to write only in limericks. So when they're trying to take notes in class, instead of normal writing, it comes out as comical rhymes. This can be a source of great embarrassment, especially if they don't notice right away. Also, pranks with vanishing ink on important parchments are quite common in fanfiction. The victim thinks they've written important information, but it all disappears, leaving them frustrated and others amused.
Typically, Harry is one of the main ones. He has a knack for getting into and out of trouble with his pranks. Hermione might also be involved in some pranks in a more strategic way, using her vast knowledge of magic to create unique and elaborate pranks. And of course, the Weasley twins are almost always at the center of the most elaborate and chaotic pranks in the fanfiction.
In the fanfiction world, Harry might be the heir to Hogwarts if there was some sort of magical pact made generations ago. For example, perhaps one of his ancestors had a special role in the creation or protection of Hogwarts, and this role was passed down through the family. It could also be that his unique magical abilities, like his ability to resist Voldemort's attacks from a young age, are signs of a deeper connection to Hogwarts itself. This connection could be what designates him as the heir in the fanfiction's plot.
One prank could be Harry using magic to make all of Dudley's clothes two sizes too small overnight. Another might be making the Dursleys' living room furniture float whenever they try to sit down. And he could also use magic to make the food on their table turn into slugs when they're about to eat.
One great 'Harry Potter Pranks' fanfic is 'The Prankster's Legacy'. It shows the Weasley twins' pranks in a whole new light, with detailed descriptions of their elaborate set - ups. Another good one is 'Pranks at Hogwarts' which focuses on different students' attempts at pranks throughout the school year. And 'A Prank - Filled Adventure' is also quite interesting as it follows a group of students who form a prank club and their misadventures.
One possible reason could be that he was under the influence of a powerful dark magic or a curse that made him lose control. Another reason might be that he was tricked into believing Hogwarts was a threat to the wizarding world in some extreme way. Maybe a powerful enemy manipulated him to think that destroying Hogwarts was the only way to save everyone.
Yes, in many fanfictions, Harry Potter can have special interactions with Hogwarts, like it being a sentient entity he can communicate with. It adds an interesting twist to the story.