In certain Harry Potter and Legend of Zelda fanfictions, there are crossovers in terms of character traits. Link's courage and determination can be compared to that of Harry Potter. In a story, they might team up to face a common enemy. This enemy could be a dark wizard who has somehow obtained a powerful Zelda artifact. The two heroes would then combine their skills, Link with his swordsmanship and Harry with his magic, to defeat this new threat.
Well, in some fanfictions, the Triforce from Legend of Zelda could be linked to the magic in Harry Potter. Maybe the power of the Triforce is seen as an ancient and extremely powerful form of magic that some wizards in the Harry Potter universe are trying to understand or control. Also, the creatures from both universes could interact. For instance, a Hippogriff might befriend a Cucco. It makes for really exciting and unique storylines.
One interesting crossover could be the use of magic spells from Harry Potter in the world of Legend of Zelda. For example, a character might use the 'Accio' spell to retrieve a key item in a Zelda dungeon. Another could be the appearance of Zelda characters in Hogwarts. Link could be a mysterious new student who has unique skills with his sword that are both magical and physical, much like some of the wizard dueling skills in Harry Potter.
Well, in 'Harry Potter Legend of Zelda fanfic', a cool crossover could be the characters swapping roles. Imagine Link using a wand instead of his sword and shield. He could use spells to solve puzzles in dungeons. Or Harry Potter could be on a quest in Hyrule, using his magical knowledge to defeat the likes of Ganon. The magic items from Zelda, like the Ocarina of Time, could have magical properties similar to the Deathly Hallows in the Potter universe.
One interesting crossover could be the use of Naruto's ninjutsu in the world of Zelda. For example, Naruto's shadow clone jutsu might be used to solve puzzles or fight enemies in Zelda's dungeons. Another aspect could be the sharing of character traits. Link's determination and Naruto's never - give - up attitude could combine to create a really strong and inspiring character in the fanfiction.
Some fanfictions might explore the idea of the Triforce in the RWBY universe. Suppose the Triforce represents a powerful force that could either help or harm Remnant. The characters from both worlds would be drawn to it. The Zelda characters, with their knowledge of the Triforce, would have to work with RWBY's Huntsmen and Huntresses to protect it from falling into the wrong hands. There could also be a situation where Zelda's dungeons are reimagined in the RWBY world, and the RWBY teams have to go through them to achieve a certain goal.
One interesting crossover could be the use of magic from Harry Potter in the Avatar world of Legend of Korra. For example, a character might use a spell to enhance their bending abilities. It could create unique and exciting storylines.
Another concept could be that some of the magical creatures from Harry Potter end up in the Zelda world. Hippogriffs could be used as a form of transportation for Link and his allies. And the house - elves could have an interesting role, perhaps they help out in the various villages in the Zelda world, using their magic to clean up and cook, while also getting a taste of freedom in this new world.
Well, in some fanfiction, we might see Anna and Kristoff visiting Hogwarts. They could be amazed by the moving staircases and magical creatures. In reverse, Harry, Ron and Hermione could end up in Arendelle. Hermione might be intrigued by the way Elsa controls her ice powers and try to find a scientific or magical explanation for it. Also, the Dementors from Harry Potter could be compared to the dark forces in Frozen 2, like the mist that Elsa has to face.
One interesting crossover could be the use of magic in the Avengers world. For example, Hermione could use her knowledge of spells to help the Avengers solve a problem that technology couldn't. Maybe she could use a spell to break through an impenetrable force field created by an enemy. Another aspect could be the Avengers characters learning magic. Tony Stark might be fascinated by the concept of magic and try to incorporate it into his technology. Or Thor could share his knowledge of Asgardian magic with the Hogwarts students.
One interesting crossover could be a scenario where Hermione uses her magic to help Elsa control her powers better. Maybe she creates a spell that can soothe Elsa when she's about to lose control.
In some fanfiction, Maleficent might team up with a dark wizard from the Harry Potter universe. They could combine their powers to try and take over both the wizarding world and the fairy - tale land where Maleficent comes from. This would create a complex power struggle with the heroes having to find new ways to combat them.