One interesting fanfiction could be about the Weasley twins creating a new line of magical pranks that backfire in hilarious ways. For example, they might make a potion that's supposed to make people's hair change colors randomly, but instead it makes them speak in rhymes for a day.
Another great fanfiction idea could be that the Weasley twins open a magical joke shop in a different wizarding country. They have to deal with different magical cultures and regulations. They might find that some of the local magical creatures are either very helpful or extremely mischievous when it comes to their shop. They also have to adapt their products to the local tastes, which leads to some really creative new pranks.
One great fanfiction could be about Harry joining the Weasley twins in their prank - planning adventures at Hogwarts. They might come up with some elaborate schemes to outwit Snape or Filch.
One idea could be the twins inventing a new type of magical prank product that has unexpected effects on Hogwarts. For example, it might make the staircases act even more erratically than normal, causing chaos throughout the school.
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.
You might like 'The Twins' Unseen World'. This fanfiction takes a different approach to the Weasley twins. It shows their relationship from a more emotional and hidden side. There are parts where they face challenges together and the way they rely on each other is beautifully written. It's a great read for those who love exploring the deeper connection between the two.
A popular 'Harry Potter and Weasley Twins' fanfiction is 'Pranksters in Peril'. In this one, the twins find themselves in a dangerous situation after one of their pranks goes wrong in a big way. It's exciting to read as they use their wits and their knowledge of magic to get out of trouble. Another one is 'Weasley Twins and the Time - Turner'. This fanfic plays with the idea of the twins getting hold of a Time - Turner and the chaos that ensues as they try to fix some past mistakes.
Another plot could be that the OC is a muggle - born with an uncanny ability to see through magical illusions. The Weasley twins, known for their love of creating illusions, initially see the OC as a threat to their pranks. But as they get to know the OC better, they realize that they can use this ability to create even more elaborate and undetected pranks. This would involve a lot of character development for all of them as they learn to trust and rely on each other.
One interesting Harry Potter twins fanfiction could be about the twins' secret adventures during the Triwizard Tournament that the original books didn't cover. Maybe they discovered a hidden passage in Hogwarts that led to a chamber full of ancient magical artifacts related to the tournament.
One idea could be that Harry and the Weasley twins team up to play a huge prank on Snape. They use a combination of Fred and George's magical inventions and Harry's invisibility cloak to get into Snape's office and rearrange everything in a really chaotic way.
In many fanfictions, the twins' mischievous side is explored further. They might come up with even wilder pranks than in the original books, showing their creativity and love for chaos. For instance, they could turn the Gryffindor common room into a giant maze for a day just for fun.
One great 'Weasley Twins x Harry Potter' fanfiction is 'Pranks and Prophecies'. It shows the twins including Harry in their wild pranks while also delving into the deeper magical mysteries at Hogwarts. The story has a great balance between humor and adventure, which is typical of fanfictions involving the Weasley twins.