Some Kingdom Hearts 3 crossover fanfictions cross over with the Pokémon universe. Imagine Sora traveling to the Pokémon world, where he has to catch Pokémon instead of using the Keyblade all the time. He could form a team of Pokémon and use them in battles against Heartless that have invaded the Pokémon world. The concept of friendship and growing stronger with your companions, which is central to both Kingdom Hearts and Pokémon, is emphasized in these crossovers.
The Kingdom Hearts and Harry Potter crossover is quite popular. You can have Sora and his friends exploring Hogwarts. The contrast between magic in the two universes is fascinating. For instance, Keyblade wielding in the halls of Hogwarts is an amazing concept.
One great Kingdom Hearts crossover in fanfiction is with Final Fantasy. The different worlds and characters blend really well. For example, Sora meeting Cloud in a unique setting. It adds a new layer of adventure and character development.
Some crossovers might involve the villains. Orochimaru could be interested in the power of the Heartless or the Keyblades. He might try to manipulate the situation in the Kingdom Hearts world. And the Organization XIII members could see Naruto's unique powers as a threat or a tool for their own plans. This would lead to some intense battles and strategic alliances between the characters of both series.
A really cool aspect in some crossovers is how the different power - ups work. For instance, if a character from Fairy Tail were to get a Keyblade, they would have to learn how to use it in addition to their own magic. This could lead to some really creative storylines, like Lucy using her Celestial Spirit Magic along with a Keyblade to defeat enemies in a way that neither series has seen before.
A great aspect of a Final Fantasy 10 and Kingdom Hearts fanfiction crossover could be the character relationships. Yuna and Sora, for instance, could form an interesting friendship. Yuna's calm and spiritual nature might contrast and complement Sora's more impulsive and adventurous side. They could learn from each other's experiences, with Yuna teaching Sora about the summoning and the fayth, while Sora shows Yuna the power of the Keyblade and the importance of believing in oneself in the face of great evil.
One popular theme is the clash of different power systems. For example, how Sonic's super forms compare to the power of the Keyblade. Another is the exploration of different worlds. Authors like to put Sonic characters into the unique and often beautiful or dangerous worlds of Kingdom Hearts.
One interesting crossover could be the characters' power - ups. For example, Sora from Kingdom Hearts might learn some ki - based attacks from the Dragon Ball Super characters. This would be a cool blend of the two universes' fighting styles.
Writers study both sets of characters carefully. For example, if they are doing a Kingdom Hearts 3 and Harry Potter crossover, they would re - watch the Kingdom Hearts cutscenes and read the Harry Potter books. This way, they can ensure that Sora remains his optimistic, brave self, while Harry is still the determined and intelligent wizard. They also look at how the characters react to different situations in their original stories and try to replicate that in the crossover. If Sora is put in a situation like a wizard's duel in Hogwarts, he would likely approach it with his usual sense of adventure and a bit of naivete.
One great 'Kingdom Hearts Crossover Fanfiction' is 'Kingdom Hearts and Final Fantasy: The Convergence'. It combines the elements of Kingdom Hearts and Final Fantasy in a really interesting way. The characters from both universes interact in a believable manner, and the plot keeps you hooked from start to finish.
One idea could be that Sora and his friends end up in Equestria. They could team up with the ponies to fight a new threat that is affecting both their worlds. Maybe the Heartless are somehow being drawn to Equestria's magic and they need to find a way to stop it together.