A great fanfic idea could be that Ed is brought to Hogwarts to teach Defense Against the Dark Arts. Since he has faced many dangerous situations in the FMA world, he has a lot of combat and survival skills to share. He could introduce unique fighting techniques that combine alchemy with the need to defend against dark magic. He might also have some interesting interactions with the Hogwarts professors, like Snape being skeptical of his unorthodox teaching methods.
One possible fanfic could be 'Ed's Magical Adventure in Hogwarts'. In this, Ed uses his alchemical skills in the wizarding world. He might teach the students about different ways of manipulating matter, which is quite similar to magic in some aspects. For example, he could show how to transform basic elements, just like a transfiguration spell.
Well, if Ed was a teacher in a FMA - Harry Potter crossover fanfic, it could be really interesting. He might teach alchemy in Hogwarts. Imagine him trying to explain the principles of alchemy to the wizards, who are used to magic in a different way. He could get frustrated with the lack of understanding at first, but eventually find students who are really into it. He might also have some run - ins with the more traditional teachers who don't quite understand his methods.
In a crossover fanfic, Ed might teach a class on the practical applications of energy manipulation. Alchemy in FMA is all about understanding and controlling energy. He could show the Hogwarts students how to use their magic in more efficient and creative ways, similar to how he uses alchemy. For instance, he could teach them how to focus their magic energy for a more powerful spell, just like he focuses his alchemical energy for a difficult transmutation.
It could work by having Ed teach a unique subject that combines elements of both FMA and Harry Potter. For example, a class on magical alchemy. He would use his knowledge from FMA to introduce different techniques and concepts that the students of Hogwarts have never seen before. His presence would also create some interesting interactions with the existing characters in the Harry Potter universe, like Dumbledore or Snape.
It could be a story full of surprises. The Boggart might take on forms related to the FMA world, like the homunculi, which would be really strange for the Harry Potter characters. And for EDS, Edward might have to figure out how to use his alchemy without drawing too much attention in the wizarding world. He could end up using it in a very discreet way to defeat the Boggart. For example, he might transmute a small object in his pocket into a tool to scare the Boggart away.
One popular fma Harry Potter crossover fanfiction might involve Ed's unique alchemy skills being transferred to the Harry Potter world. For example, he could use his knowledge to create magical items in a different way than the wizards are used to. Another aspect could be how Ed, as an ambassador of sorts, tries to bridge the gap between the two very different worlds of Fullmetal Alchemist and Harry Potter, perhaps leading to some interesting cultural exchanges within the story.
One common theme could be the clash of different magical systems. In Harry Potter, there's the magic based on spells and potions, while in FMA there's alchemy. Another theme might be the exploration of different cultures and values. The pride aspect could also play into characters showing their unique identities and abilities from both universes.
One great 'hetalia harry potter crossover fanfic' is 'The Magical Nations at Hogwarts'. It has an interesting plot where the Hetalia characters are magically transported to Hogwarts. They interact with the Harry Potter characters in a really fun way, like Italy being super confused but also excited about all the magic around him.
One great 'Merlin and Harry Potter' crossover fanfic is 'The Merlin Effect in Hogwarts'. It combines the magic systems of both universes really well. The characters from Merlin, like Merlin himself, fit surprisingly well into the Hogwarts setting. They interact with Harry and his friends in interesting ways, for example, Merlin uses his unique magic to solve some of the problems at Hogwarts that the students there are facing. It's a fun read for fans of both series.
In a fanfic with this crossover, the interaction of the magic systems would be a central and fascinating aspect. Alchemy in FMA has its own set of rules and limitations, as does magic in Harry Potter. When it comes to the Boggart, the Harry Potter characters rely on their spells and the power of their minds to change the Boggart's form into something humorous. Edward, with his EDS status, could bring in the concept of equivalent exchange. Maybe he could offer something in exchange for the Boggart to leave or change its form in a more permanent way. And the magical energy in the Harry Potter world could interact with Edward's alchemy. It could either disrupt it if they are too different, or it could merge in some ways, allowing for new and creative ways to deal with threats like the Boggart.
There are also fanfics that explore alternate universes. In these, the relationship between Ed and Al could be different from the canon. Maybe they are in a world where alchemy works differently, or they have different personalities. This allows for a lot of creativity in exploring their relationship in new settings and scenarios. It can also lead to different interpretations of their bond, whether it becomes more strained or even closer in these alternate worlds.