Another theme is the exploration of different worlds. Kingdom Hearts has its Disney - based worlds and other original ones, while Final Fantasy XV has its own unique locations. Fanfictions might involve characters from one series exploring the worlds of the other, leading to new adventures and self - discovery.
Friendship and loyalty are also prevalent themes. In Final Fantasy XV, Noctis and his friends are deeply loyal to one another, and in Kingdom Hearts, Sora's relationships with Donald, Goofy, and his other friends are central. Fanfictions often explore how characters from both series would bond over these shared values.
One popular 'Final Fantasy XV x Kingdom Hearts' fanfiction might be those that explore the crossover of the unique magic systems from both universes. For example, how the Keyblade from Kingdom Hearts could interact with the magic and weapons in Final Fantasy XV.
A common theme is the clash of different worlds. The high - tech, mechanical world of Transformers Prime and the more magical, medieval - inspired world of Final Fantasy XV collide. Another theme could be cooperation. Characters from both sides having to team up to fight a greater evil. For example, the Autobots and the Noctis' crew working together against a powerful enemy.
One common theme is the exploration of different powers. Since both RWBY and Final Fantasy XV have unique power systems, fanfics often explore how these powers interact. For instance, the Dust in RWBY and the Magic in Final Fantasy XV can create some really interesting combinations.
Another theme is the adaptation of characters to new environments. In crossovers with a post - apocalyptic world like in 'Mad Max', the characters of Final Fantasy XV have to learn new survival skills and ways of life. They might have to use their combat skills in different ways, like Noctis using his weapons to fight off raiders instead of the usual monsters. This theme of adaptation also includes how the characters interact with new cultures and social structures.
One common theme is self - discovery. The reader often finds themselves in a strange new world (the Kingdom Hearts world) and has to figure out who they are in this context. Another is friendship. They usually form strong bonds with the characters from the game, like Sora, Donald, and Goofy. And of course, there's the theme of good vs. evil, as they often have to fight against the Heartless and other villains in the Kingdom Hearts universe.
One common theme is adventure. The male OCs often embark on epic quests, similar to the main storyline of Final Fantasy XV. Another theme is friendship. They form bonds with the existing characters in the game.
One interesting concept could be the combination of different magic systems. In Kingdom Hearts, there's the Keyblade magic, and in Final Fantasy, there are various elemental and spellcasting systems. In fanfiction, they might blend these in unique ways, like a character using a Keyblade to cast a Final Fantasy - style spell.
The theme of loyalty is frequently seen. They are loyal to each other and fanfictions show how this loyalty plays out in different situations. Also, the idea of redemption can be found in many of these fanfictions. Maybe one of them has made a mistake and the other helps in the redemption process.
A prevalent theme is the power of love and friendship. Roxas and Namine's relationship in fanfiction often shows how they can support and heal each other. Also, the theme of redemption can be seen. Given the complex backstories of the characters, they might find redemption through their relationship. For instance, Roxas might find a new purpose in protecting Namine, and Namine might find a way to be more in control of her powers through Roxas's support. This all adds depth to their relationship in the fanfictions.
The theme of friendship or an unlikely bond is also prevalent. Despite the Heartless being the enemy, some fanfictions may depict Sora forming a connection with them. This can be a very interesting take as it goes against the normal perception of the relationship between Sora and the Heartless in the original game. It can also be a way to show Sora's capacity for compassion.