Well, if he was in the My Hero Academia world, his 'quirk' could be his super strength, flight, and heat vision all combined as one overpowered quirk.
Perhaps his quirk is simply 'Solar - Powered Heroics'. Since Superman gets his powers from the sun in the original lore, in the My Hero Academia fanfiction, this quirk could mean he gets stronger the more sunlight he absorbs. He could start off relatively weak in cloudy weather and then become super powerful on a sunny day, adding an interesting aspect to battles and his character development.
His quirk could be called 'Kryptonian Powers'. It would include all of his traditional abilities like super speed, invulnerability, and super hearing. And since quirks in My Hero Academia often have a drawback, his could be that he is weak to Kryptonite, which could be a new element introduced in the fanfiction.
His quirk could be something like 'Limitless Rage - Transformation'. When he gets angry, his body transforms into the Hulk form, growing in size and strength. The angrier he gets, the more powerful he becomes, similar to how it works in the Hulk's original story.
One cool quirk idea could be 'Shadow Mimicry'. The user can blend into any shadow and move freely within the shadow realm, also being able to mimic the actions of those whose shadows they are in. It gives a lot of stealth and surprise attack possibilities in a fanfiction.
His relationship with Bakugo would likely change significantly. Bakugo might initially be jealous of Izuku's unique shadow quirk. But over time, they could develop a more competitive but respectful relationship, as Izuku's shadow quirk gives him new ways to fight. With his friends like Uraraka, Izuku's new quirk could make him seem a bit more mysterious. Uraraka might be curious about how his quirk works and they could bond over her trying to understand it.
Tsuna's quirk, if we assume his Dying Will Flames are his quirk in the MHA universe, would likely be classified as an emitter type quirk. He could use his X - Burner attack as a long - range offensive move against villains. His hyper intuition could also be a part of his quirk, allowing him to predict his opponents' moves in battle. This would make him a valuable asset in hero teams, especially in complex battles where strategy is key.
Well, if Izuku had a quirk in a fanfiction, he might be an even more formidable hero. He could have a quirk that combines elements of his original quirkless determination and a newfound power. For example, maybe he has a quirk that allows him to enhance the quirks of those around him while also having his own unique ability, like super strength. This would change the dynamic of his relationships with his classmates. He wouldn't be the underdog in the same way, and might take on a leadership role more quickly.
One idea for a Deku's Quirk fanfiction could be exploring what would happen if Deku's quirk manifested in a different way. For example, instead of having to gradually control One For All, he suddenly has full mastery from the start. This could lead to a very different story arc where he is immediately seen as a top - tier hero - in - training, causing envy and admiration in equal measure among his classmates.
One idea could be a fanfiction where Deku's quirk suddenly mutates. Instead of just having One For All, he starts to develop an additional power related to it, like the ability to share a fraction of One For All's power with his friends temporarily to boost their own quirks in a time of great need.
The 'Plant Symbiosis' quirk would be a great addition to a fanfiction. The individual with this quirk can form a symbiotic relationship with plants. They can communicate with plants, make them grow rapidly, and even use plants as an extension of their body for things like creating shields or lashing out at enemies. This quirk could bring a whole new element of nature to the story.
First, consider their motivation for using the Copy Quirk. Are they using it to become the best hero? Or maybe to prove themselves to someone? For example, if they want to be like their idol hero, they might copy only the quirks of that hero at first. Then, think about the limitations of the quirk. Maybe they can only copy a quirk for a short time, so they have to strategize when to use it. This would force them to study different quirks and opponents carefully.
One idea could be fusing Bakugo's explosion quirk with Todoroki's ice quirk. Imagine a hero who can create explosive ice shards. It would be a visually stunning and powerful ability. Another could be fusing Uraraka's zero - gravity quirk with Midoriya's One For All. The hero might be able to make objects weightless and then send them flying with super strength.