Well, there's the classic one where a guy told his roommate that their apartment was being fumigated immediately and they had to evacuate. The roommate panicked and started gathering important stuff. Only later did he find out it was April Fools'.
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 of the funniest pranks could be that the Kyuubi makes Naruto's clones start singing cheesy pop songs instead of following his commands. Naruto often uses his clones in battles and for various tasks. So when he sends them to attack an enemy, they all start singing and dancing instead. This would not only be a shock to Naruto but also to his opponents. Another great prank would be the Kyuubi making Naruto's body move in the opposite direction of what he wants. So when he tries to jump forward, he jumps backward instead, leading to all sorts of comical situations.
I think 'The Odyssey' is a great 'best world story'. It tells the long journey of Odysseus trying to return home after the Trojan War. Along the way, he faces numerous challenges like the Cyclops, sirens, and other mythical creatures. This epic story not only shows the hero's courage and intelligence but also reflects on themes such as loyalty, perseverance, and the longing for home.
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.
One of the best April Fools' pranks I heard was when a person changed all the labels on the food in the fridge. So instead of 'yogurt' it said 'alien goo'. Their family members were really confused in the morning. It was simple yet super funny.
Naruto could enlist the help of his friends like Shikamaru. Shikamaru could come up with a really elaborate plan. For example, they could set up a fake mission where Ibiki thinks he's in charge, but it's all just a setup for a series of pranks. They could have actors pretending to be enemy ninjas who act really silly instead of being threatening. And Naruto could keep popping up in unexpected places during this 'mission' to further annoy Ibiki.
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.
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 story could be about a rooster that wakes up the whole farm every morning without fail. His crowing is so consistent and strong that he becomes the most reliable 'alarm clock' for the farmers.