One possible prank could be that Harry and Luna use magic to make the Order members' shoes squeak uncontrollably whenever they walk. It would be really funny to see serious Order members like Moody or Kingsley trying to figure out how to stop the squeaking while on important missions.
Maybe they could magically switch the voices of the Order members. So, Sirius would have McGonagall's strict voice and vice versa. This would lead to some really hilarious and confusing conversations within the Order. They might start suspecting some kind of dark magic at first until they realize it's just a prank.
They could also create an illusion of a horde of garden gnomes invading the Order's headquarters. The gnomes could be running around, stealing food from the table and making a general mess. Harry and Luna could watch from a hidden spot as the Order members try to chase away the non - existent gnomes, all while trying to keep their straight faces.
Well, the Order as a whole would likely have a mixed reaction. There would be those who are amused and those who are annoyed. But overall, it could also bring a sense of lightness to the often - tense atmosphere within the Order. After all, they are fighting a dark war, and a little bit of humor from Harry and Luna's pranks could be a welcome break. It might also make them realize the importance of not losing their sense of fun and humanity even in the face of great danger.
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.
Harry could use the Marauder's Map to always know where Voldemort is and then set up little magical traps in his path. For example, a puddle that turns into a sticky mess when Voldemort steps in it.
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.
Harry is brave and a bit mischievous. His bravery allows him to take risks while playing pranks. For example, he might not be afraid to prank a strict teacher like Snape. Luna, on the other hand, is very creative and has an out - of - the - box thinking. So she could come up with really unique prank ideas, like making the school owls deliver love letters to the wrong people. Together, their personalities make their pranks both daring and imaginative.
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 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.
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.