A possible fanfiction could be about a young wizard from Harry Potter's world who is a huge fan of the tales of Clark Kent in Smallville. This wizard accidentally casts a spell that transports him to Smallville. There he meets Clark and they become friends. Meanwhile, the presence of the wizard attracts the attention of some demons that Dante from Devil May Cry usually hunts. So Dante also arrives in Smallville, and they all have to work together to send the wizard back to his world and stop the demons.
One idea could be a crossover where Danny Fenton, as Danny Phantom, accidentally gets sucked into the Devil May Cry universe. He teams up with Dante to fight a new type of demon that is causing chaos in both their worlds. Maybe this new demon is using some sort of ghost - like powers, which Danny can help understand while Dante provides the combat expertise.
The settings can be merged by creating a sort of interdimensional hub. For example, Hogwarts could have a secret chamber that leads to Smallville. And from Smallville, there could be a strange rift that opens to the Devil May Cry world. In this way, characters can move between the settings. Another way could be through a magical spell in the Harry Potter world that misfires and creates a portal to both Smallville and the Devil May Cry world.
One idea could be that Dante from Devil May Cry gets transported to the wizarding world of Harry Potter. He could mistake the wizards' magic for some kind of demonic power at first. Maybe he'd try to slay a Hippogriff thinking it was a demon, creating chaos at Hogwarts.
One idea could be that Dante from Devil May Cry is somehow transported to the Marvel universe. He teams up with the Avengers, like Iron Man. Dante's unique combat style and devil - slaying abilities would be a great addition to the team. For example, he could use his Rebellion sword against powerful foes that the Avengers are having trouble with, such as Loki if he were to return in a more powerful form.
The combination of magic systems. In Harry Potter, there's wand - based magic, spells, and potions. In Devil May Cry, there are demonic powers and cool weapons. When these two are combined in fanfiction, it creates a really unique power - up system for the characters. For example, a character might use a spell to enhance the power of a Devil May Cry - style weapon.
One idea could be a crossover where Dante from Devil May Cry enters the Mortal Kombat tournament. He could bring his unique swordsmanship and devilish powers, creating a stir among the Mortal Kombat fighters. His wisecracking personality would also add an interesting dynamic to the usually serious Mortal Kombat setting.
Harry Potter and Dante would make great main characters. Harry with his knowledge of magic and Dante with his combat skills against demons. They could team up to face a new threat that combines dark magic and demonic forces.
There's also 'Potter and the Devil's Quest'. In this fanfiction, Harry Potter is somehow transported to a world that has elements of Devil May Cry. He teams up with some of the characters from Devil May Cry to fight a common enemy that is threatening both his world and the new world he's in. It's full of exciting battles and some really cool crossovers between the two universes.
One idea could be that Fluttershy somehow gets transported into the Harry Potter world. Maybe she arrives at Hogwarts as a new kind of magical creature that the students have never seen before. Her gentle nature might initially cause confusion among the more rowdy students, but she could gradually make friends with the likes of Luna Lovegood, who would be intrigued by her uniqueness.
Another concept could be that Harry Potter discovers he has a connection to Magneto's mutant powers. This might happen during a strange encounter with a dark magic object that unlocks a latent power within him. He then has to learn how to control these new abilities while also dealing with the threats in his own wizarding world, and he might seek out Magneto for guidance in a secret meeting across the boundaries of their two worlds.