What is the most popular Harry Potter fanfiction?

Another popular type is the 'What - If' scenarios. For example, what if Voldemort had won? These stories take a different turn from the original plot and let the imagination run wild. They often explore how the wizarding world would be under different circumstances, and it's fascinating to see how the characters would react.

Magic and spells are very popular. Writers often come up with new spells or expand on the existing ones in the books. Another popular element is the relationships between characters. Whether it's romantic relationships like Harry and Ginny's or friendships like the trio's. The wizarding world itself is also a big draw, with its unique locations such as Diagon Alley and Hogsmeade.

One of the most popular themes is alternate universes. Fans love to imagine what would happen if certain events in the original story were different. Another popular theme is character relationships, especially the romantic relationships between characters like Harry and Hermione, which deviate from the original pairings. And of course, there are a lot of fanfictions that focus on the dark side of the wizarding world, exploring how Voldemort could have been even more menacing or what other dark wizards might be out there.

One popular theme is identity. Since Metamorphmagi can change their appearance, fanfictions often explore how this affects their sense of self. Another theme is secrecy. They might have to hide their ability, which creates interesting plotlines.

In 20 years of Harry Potter fanfiction, there are several popular tropes. The 'Powerful!Harry' trope is quite common. Fans like to write about Harry having even more power than in the books. Also, the 'Soulmate' trope is popular, especially when it comes to romantic pairings. And the 'Dark!Hermione' trope has emerged, where Hermione takes a more morally ambiguous or even dark path, which is an interesting twist on her character.

The 'Power Transfer' trope is often seen. This is when a character from one series gains the power or ability from the other series. Say, Harry getting the ability to see ghosts like Sam does in Supernatural. And then there's the 'Shared Enemy' trope. A threat that is dangerous to both the wizarding world and the Supernatural world forces the characters to cooperate, creating exciting storylines.

One of the popular elemental themes is the use of fire. It often represents power and passion. Many fanfictions have characters who can conjure and control fire in unique ways, like creating phoenix - like flames. It gives a sense of danger and intensity to the story.

Well, a common plot involves the characters swapping places. Luffy ending up in Hogwarts and having to deal with magic lessons while Harry finds himself on the Thousand Sunny. Also, there are plots where they team up to solve a common threat that endangers both their worlds, like a new dark magic that spreads to the One Piece world.

One of the most popular themes is the 'What if' scenarios. For example, what if Harry had been sorted into Slytherin? Another common theme is the exploration of character backstories that J.K. Rowling didn't fully delve into in the original books, like the early life of Severus Snape. And relationships, not just romantic ones but also friendships, are often explored in-depth. For instance, the friendship between Harry, Ron and Hermione from different perspectives.

One popular theme is the clash of cultures. The very different natures of the wizarding world and the Xenomorphs' universe make for an interesting contrast. Another is survival, as characters from the Harry Potter world have to figure out how to survive against the deadly Xenomorphs. And of course, there's the theme of magic vs. brute force, as the wizards' spells are pitted against the Xenomorphs' physical strength and reproductive abilities.