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.
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.
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.
There could be a fanfiction where Hermione comes up with a brilliant prank. She uses a spell to make Umbridge's parchment write out all the unjust rules she has made instead of whatever Umbridge is trying to write. Every time Umbridge tries to write a memo or a note, the parchment just keeps repeating things like 'No groups larger than three' and 'No fun allowed' over and over again, driving her mad.
Well, in some fanfictions, there are pranks like magically changing the taste of the food in the Great Hall. So, instead of delicious pudding, it turns into something like stinky socks. Also, pranks with brooms are popular. For example, some students might charm the Slytherin team's brooms to suddenly start flying backwards during a Quidditch match. And then there are pranks with spells that make a person's voice change randomly, which can lead to some really funny situations in the hallways.
One interesting scenario could be Harry using a charm to make Snape's potions ingredients misbehave during class. For example, the shrivelfigs start bouncing around the cauldron. Another could be Harry transfiguring Snape's cloak into a bright pink color while he's walking down the corridor. Or perhaps Harry using a spell to make Snape's voice change into a high - pitched squeak when he's trying to give a lecture.
Maybe Harry could use a transfiguration spell to turn all of the twins' clothes into something ridiculous, like bright pink tutus. Since they are always the ones playing pranks, it would be a great turn of events. He could do it when they are about to go to a big event at Hogwarts, like a Quidditch match or a school dance.
One interesting prank could be to magically change the Dark Lord's robes into something ridiculous like a frilly pink dress. It would be a shock to his dignity and his followers' perception of him.
In some fanfics, the 'pranks bashing' might involve the teachers getting fed up with the constant pranks. So, they come up with their own clever ways to stop the students from pranking. Professor McGonagall could use her transfiguration skills to turn all the prank items into harmless objects. This would not only put an end to the chaos but also teach the students a lesson about respect for the school environment.
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.
One creative prank could be that Harry uses magic to make Umbridge's quills write only nonsense whenever she tries to write a decree. Another could be that he enchants her office so that every time she sits in her chair, it makes a loud and embarrassing noise, like a donkey braying. And he could also charm her teacup to refill with a really bitter-tasting potion instead of tea.