What are some of the most memorable Harry Potter pranks in Hogwarts fanfiction?

Well, there's a fanfic where they prank Carlisle by making his office look like a disco. They put up disco balls, flashing lights and played really loud disco music. It was hilarious. Also, the prank where they switched Rosalie's beauty products for really cheap and smelly ones. Rosalie was so angry and her reaction was quite memorable.

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.

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.

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 some fanfictions, Lucy pranks Erza by making her think that there's a new rule in the guild about eating only sweet things. Erza, being strict about rules, starts to enforce it until she realizes it was a prank. It's memorable because of Erza's initial seriousness.

The Weasley twins, Fred and George, are the most likely characters to pull pranks. They have a natural inclination towards mischief and are always coming up with new and creative ways to play jokes on their classmates and teachers. Their inventions, like the Skiving Snackboxes, are often used in pranks.

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.

Peter could play a really funny prank on the Avengers. He might use his agility to secretly attach some helium balloons to Captain America's shield. So when Cap tries to throw it, it goes all wobbly in the air because of the balloons. And for the Hulk, Peter could create a holographic image of a really cute kitten right in front of him. Since the Hulk is usually associated with destruction and anger, seeing a cute kitten would be a really unexpected and humorous situation.

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.