One interesting 'Harry Humor Fanfic' could be about Harry accidentally turning his hair into rainbow colors during a spell gone wrong. It would be a hilarious take on his magical mishaps.
One example could be a fanfic where the Weasley twins play an even more elaborate prank on Umbridge. They might transform her office into a giant Quidditch pitch, complete with flying bludgers that chase her around. Another is a story where Neville accidentally makes a potion that causes everyone's hair to turn into the shape of their Patronus. It's hilarious as Hermione has a book-shaped hair and Ron has a hair that looks like a piece of bacon.
Well, 'The Comical Curse of Harry' is a humorous fanfiction. In it, Harry is accidentally hit with a curse that makes him speak in rhymes all the time. So he goes around Hogwarts spouting rhymes like 'I'm Harry, full of folly, in the castle, feeling jolly'. It's a really light - hearted take on the Harry Potter world. There's also a fanfic where Harry and Ron start a comedy duo at Hogwarts, performing skits and making everyone laugh.
One example could be a crossover with 'The Lord of the Rings' where Harry Potter and Frodo have a comical encounter. Maybe Harry accidentally casts a spell that makes Frodo's ring float away and they both scramble to get it back in a very clumsy and funny way.
There are fanfictions that humorously depict Hagrid's attempts at teaching Care of Magical Creatures. In some, he accidentally lets loose a group of Flobberworms that start acting like they're on a mission to take over the school. They slither into the classrooms and start eating students' homework, which creates a really comical situation as everyone tries to catch them.
One interesting story could be about how the Marauders accidentally turned Snape into a giant frog during one of their pranks. It's hilarious to imagine Snape hopping around the castle, croaking angrily at them.
There are 'Harry Potter fanfic fanfic' that focus on time - travel scenarios. Imagine if a character from the later books travels back in time to the first year at Hogwarts. This can create a lot of interesting plot twists as they try to change or preserve the original story line. Also, some fanfic fanfic might center around magical creatures in a way that wasn't fully explored in the original books, like the life of a hippogriff in more detail.
A great plot idea is when Ginny and Harry get trapped in a magical room that forces them to tell only jokes. So they have to come up with the funniest things to get out. Also, there could be a plot where Ginny decides to give Harry a makeover using magic, but it all goes wrong in the most hilarious way. And what about a plot where Harry tries to prank Ginny back for all her previous pranks, but his attempts are just so bumbling and comical?
There might be a fanfic where Harry has an elemental connection to water. In this story, his ability to manipulate water helps him in underwater challenges in the wizarding world, like finding a hidden treasure or rescuing someone from a sunken ship. It could also play a role in his battles, for example, creating water barriers against spells.
A 'harry medusa fanfic' could also explore the idea of Medusa being an ancient magical being who has a connection to Harry's family. Harry discovers this connection through a series of strange events and visions. He then embarks on a journey to understand more about Medusa and how she might be related to his family's past, delving into old magic texts and seeking the advice of magical creatures.
One interesting 'Harry Charmed' fanfic could be where Harry Potter visits the Charmed Ones and they team up to fight a powerful dark wizard that has elements of both the 'Harry Potter' and 'Charmed' universes. Maybe they combine spells like the Patronus Charm with the Power of Three to defeat the enemy.