Some cool crossovers might include Naruto's summoning jutsu being used in the world of Final Fantasy X - 2. He could summon giant toads or snakes, which would be a strange sight in Spira. The Al Bhed language from Final Fantasy X - 2 could be something Naruto characters have to learn. And perhaps the Farplane in Final Fantasy X - 2 could have a connection to the afterlife in the Naruto universe. This could lead to some really deep and emotional storylines where characters from both worlds interact with the concept of death and the afterlife.
In some Naruto x Final Fantasy fanfiction, the summons in Naruto could be related to Final Fantasy summons. Like the toads in Naruto could have a connection to a similar creature from Final Fantasy. This would create unique interactions between the two universes.
One interesting crossover could be the characters from Naruto having to deal with the complex summon system in Final Fantasy X. For example, Naruto might be intrigued by the Aeons and try to form some sort of bond with them. Another aspect could be the sharing of jutsu and magic. Maybe a character from Final Fantasy X learns how to use a chakra - based jutsu, or vice versa.
A cool crossover might involve the jutsu in Naruto being combined with the spells in Final Fantasy 14. Picture Sasuke using a spell like Blizzard III from Final Fantasy 14, but with his own Uchiha - style twist. Also, the ninja villages in Naruto could be compared to the city - states in Final Fantasy 14. The fanfiction could explore how the politics and power dynamics of both worlds interact when characters from each are forced to cooperate. Maybe the Hidden Leaf Village and Limsa Lominsa form an alliance to fight a common enemy that threatens both their existences.
One interesting crossover could be the characters from Naruto using the Materia from Final Fantasy 7. For example, Naruto with the Fire Materia could enhance his Rasengan with fire elemental powers. It would be a really cool visual to see.
A crossover could involve the ninjas from Naruto's world being intrigued by the magic in Final Fantasy 7. Gaara's sand powers could be compared to some of the earth - based magic in FF7. For example, his sand might interact in interesting ways with spells like Quake. In a fanfiction, they could all participate in a tournament where ninjas and FF7 characters show off their skills, and Naruto and Gaara have to adapt their fighting to the different rules of the FF7 universe.
A crossover might involve the storylines. Picture the ninja world of Naruto facing a threat similar to the fal'Cie in Final Fantasy XIII. The shinobi could team up with the characters from FF XIII to fight this common enemy. The different cultures and power systems would create a really engaging and unique story.
A possible fanfic could explore the concept of the crystal in Final Fantasy XV and the Fayth in Final Fantasy X. Maybe the crystal's power has some sort of connection to the Fayth, and characters from both games have to figure out how to use this connection to restore balance. This could involve a journey across both worlds, with characters learning about each other's cultures and histories along the way.
One good crossover could be a story where Naruto characters gain the power of the l'Cie from Final Fantasy 13. For example, Naruto could be a l'Cie with a focus on his wind - based jutsu, making it even more powerful. Another idea is a plot where the ninja world is in danger and the characters from Final Fantasy 13 come to help, bringing their unique magic and technology. It could also be interesting to see how the summons in Naruto compare to the Eidolons in Final Fantasy 13.
One interesting crossover could be the combination of RWBY's unique combat styles with Final Fantasy's magic systems. For example, Ruby's scythe - wielding skills might be enhanced with some of Final Fantasy's fire or ice magic spells. It would create really dynamic and visually stunning fight scenes.
One interesting crossover could be the use of magic systems. In Harry Potter, magic is mainly done through wands and spells, while in Final Fantasy X, magic is more about summoning and using different elements. A fanfiction might combine these, like having a wizard in the Harry Potter world learn to summon aeons from Final Fantasy X.