Another popular trope is the power - up or skill exchange. Imagine a character from Harry Potter learning the combat skills of the characters in Final Fantasy 13. Or a Final Fantasy 13 character learning how to cast spells like a wizard. This trope often leads to some really cool and unexpected battle scenes in the fanfiction.
Another well - liked trope is the 'romance across universes'. Fans love to pair characters from Harry Potter and Final Fantasy 15 together. It could be something like Hermione and Prompto falling in love. This trope adds an element of the unknown and often creates very emotional and unique stories.
A very common trope is the 'Dark!Harry' concept. In these stories, Harry turns to the dark side, either because of being mistreated or for some other reason. It's interesting to see how the story unfolds when the main hero becomes an anti - hero. Also, the 'Teacher - Student Romance' trope exists, though it's a bit controversial. But it does add an element of forbidden love to the stories.
One popular trope is the 'alternate universe' where the story takes place in a different setting or with different rules from the original series. For example, a wizarding world where Voldemort never existed. Another is the 'character redemption' trope, like Draco Malfoy getting a chance to be a good person from the start. And 'romantic pairings' that fans love to explore, such as Hermione with someone other than Ron.
One common trope is the 'fish out of water' situation where Castiel is suddenly in the Harry Potter world and has to figure out how things work. Another is the 'powerful ally' trope where he becomes a crucial help to Harry and his friends.
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.
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 fish - out - - of - water trope is also common. Picture Naruto and Garra suddenly finding themselves in the world of Final Fantasy 7. They have to adapt to the new environment, different cultures, and strange magic systems. This often leads to humorous and interesting situations as they try to figure out things like chocobos and materia. Another trope is the team - up trope. Naruto and Garra form an alliance with some of the Final Fantasy 7 characters to fight a common enemy, like a powerful villain that threatens both their worlds.
One popular trope is the 'Fish out of Water' story. For example, a character from Naruto suddenly finds themselves in the world of Final Fantasy XV or vice versa. This allows for a lot of exploration of the differences between the two universes, like the magic systems or the social structures. Another common trope is the 'Power - Up' trope. A character might gain new abilities from the other universe, like a Naruto character learning some of the unique combat skills from Final Fantasy XV.
Well, there's the 'culture clash' trope. Sofia comes from a more fairy - tale - like world with a courtly setting, and Harry Potter is set in a more traditional wizarding world. So when the two worlds meet, there are a lot of differences to explore. Also, the 'lost in translation' trope can be used when it comes to magic spells and the different languages of the two universes. And of course, the 'found family' trope, as both series have strong themes of friendship and family, can be combined in fanfiction.
One popular trope is the 'fish out of water' where Tony Stark is suddenly in the magical world of Harry Potter and has to adapt. Another is the 'team - up' trope, where they join forces to fight a common enemy, like a dark wizard using technology in a bad way.