A common trope is the transformation trope. A character from either MLP or Final Fantasy could transform into a new form that combines elements of both universes. For example, a Final Fantasy dragon could transform into a pony - like dragon with a mane and tail. There's also the mentor - student trope. A more experienced Final Fantasy character could teach a young pony about combat or magic. This helps in character development for both parties. The prophetic vision trope is also seen. A pony or a Final Fantasy character might have a vision of an upcoming disaster that will affect both worlds, which then sets the story in motion as they try to prevent it.
In MLP Final Fantasy fanfics, the 'lost technology' trope can be quite popular. Maybe there are ancient artifacts from Final Fantasy in the MLP world that hold great power, and the ponies have to figure out how to use or contain them. The 'forbidden love' trope also shows up. It could be a love story between a pony and a Final Fantasy character, which is often complicated by their different natures and the rules of their respective worlds. And the 'reincarnation' trope can add an element of mystery. A character from one universe might be the reincarnation of a character from the other, carrying with them memories and powers from their past life.
One popular trope is the self - inserted OC having a special power or ability that helps them in the Final Fantasy world. For example, they might be able to control a unique type of magic. Another is the OC forming an unexpected alliance with a well - known Final Fantasy character, like Cloud from FF7. And often, there's a trope of the OC going on a grand adventure to save the world, just like the main characters in the original games do.
One popular trope is the 'Chosen One' concept, where an ordinary character discovers they have a special destiny in the fantasy world. Another is the 'Magical Mentor' who guides the protagonist in their journey of magic and self - discovery. And the 'Forbidden Love' between different species or classes in the fantasy setting is also quite common.
The 'team - up against a common enemy' trope is also popular. They might face a villain who is trying to disrupt the harmony of Ponyville. Rarity uses her wits and Rainbow Dash uses her speed and strength. In the process, they discover new sides of each other and their friendship deepens.
A common trope is the 'fish - out - of - water' story. For example, a Star Wars character like Han Solo finding himself in Equestria and having to adapt to the very different world of ponies. Another popular one is the 'power transfer' trope. This could be a pony getting some of the Force's power or a Jedi getting a boost from pony magic. There's also the 'team - up' trope where characters from both universes join forces to fight a common enemy, like Darth Vader and an evil pony overlord.
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.
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.
One popular trope is 'enemies to lovers'. In many fanfics, two characters who initially dislike each other gradually fall in love. Another is 'the chosen one' trope, where a character is singled out for a special mission or power. 'Soulmate' trope is also common, where characters are fated to be together in some way.
The 'mentor - mentee' trope is also common. Rainbow Dash, with her confident and adventurous nature, can be seen as a mentor to Spike, teaching him about courage and loyalty. It can lead to some really heartwarming stories as Spike grows under her guidance.