One interesting idea could be a crossover with a fantasy world like Middle - earth. Pokémon could interact with hobbits, elves, and dwarves. For example, Pikachu might befriend a hobbit and help them on an adventure. Another idea is a crossover with a superhero universe. Pokémon trainers could team up with superheroes to fight supervillains. And a crossover with a historical setting, like ancient Rome, where Pokémon battles are part of the gladiator games.
One interesting crossover could be a battle between Goku and a powerful Pokemon like Mewtwo. Goku's martial arts skills against Mewtwo's psychic powers would make for an epic showdown. Another could be Goku training with Pokemon to increase his speed and agility. For example, he might train with Pikachu to learn quick dodging techniques.
Well, in Danganronpa and Pokemon fanfiction, there might be a scenario where the Danganronpa students are transferred to the Pokemon world. They could then use Pokemon to solve the mysteries that occur there. Some students might be good at training certain types of Pokemon based on their personalities. Like Byakuya would probably have some rare and powerful Pokemon, like a Dragonite perhaps, as it suits his status - obsessed personality.
One interesting crossover could be the characters from Undertale finding themselves in the Pokemon world. For example, Sans could be wandering around the Kanto region, interacting with Pokemon trainers. He might use his unique abilities in battles against Gym Leaders. Another could be Frisk trying to catch Pokemon, but with their pacifist nature, they might have a different approach to Pokemon training, like befriending them without battling.
One idea could be a Twilight crossover with Harry Potter. Picture Bella as a witch who somehow ends up at Hogwarts. Another could be a crossover with The Hunger Games, where the vampires and werewolves have to participate in the Games. Or a crossover with Supernatural, with the Twilight characters getting involved in hunting supernatural beings.
A great Zootopia crossover fanfiction idea is with the world of Avatar. The animals could visit Pandora and interact with the Na'vi. The Na'vi might be fascinated by the talking animals from Zootopia. Or a crossover with the Incredibles. The super - powered family could team up with Judy and Nick to solve a crime in Zootopia that involves some super - villainous animal. Also, a crossover with Toy Story where the Zootopia toys come to life and have their own adventures within the city would be really fun.
One idea could be an Overwatch crossover with the Star Wars universe. Imagine Tracer using her time - jumping ability in the middle of a lightsaber duel on Tatooine. Another could be a crossover with the Harry Potter world, where Winston, being the intelligent gorilla, might be intrigued by the magic at Hogwarts and try to study it. And a crossover with the Lord of the Rings, with Reinhardt as a valiant knight facing off against Orcs in Middle - earth.
One idea could be a crossover with the Powerpuff Girls. Ben could team up with the girls to fight a common enemy that is causing chaos in both their universes. Another could be a crossover with the Teen Titans. Ben's alien forms and the Titans' powers would make for some epic battles and cool team - up moments.
A great marvel crossovers fanfiction idea is to cross over the Guardians of the Galaxy with the Fantastic Four. The Guardians' intergalactic adventures meeting the scientific minds of the Fantastic Four would be full of potential. You could have Rocket Raccoon and Mister Fantastic sharing their tech knowledge, or Groot and The Thing having a friendly brawl. It would be a fun mix of different universes within the Marvel world.
Another interesting crossover could be the appearance of Chaos Emeralds in the Pokemon XY world. Pokemon might be attracted to the powerful energy of the Chaos Emeralds. This could lead to a situation where both Sonic and Pokemon trainers have to protect the Chaos Emeralds from an evil force that wants to use their power to control both the Sonic universe and the Pokemon XY world.
A common crossover idea is that the Sorting Hat is used to sort Pokemon into the different Hogwarts houses. Some Pokemon might be sorted into Gryffindor for their bravery, like Pikachu who is always ready to face challenges. Others could be in Hufflepuff if they are very loyal, like Growlithe. This kind of crossover combines the characteristics of both universes in a really interesting way.