One great quirkless Deku fanfiction is 'The Quirkless Hero'. In this story, Deku uses his intelligence and intense training to outwit villains. He forms an alliance with other underdog characters. It's really inspiring to see how he overcomes the odds without a quirk.
In fanfiction, a quirkless Deku often has to rely more on his wits. Canon Deku got One For All, but in fanfic, he has to find other ways to be strong. For example, he might study different fighting styles more intensively.
One popular fanfiction concept could be Deku proving his worth without a quirk in the Bakudeku relationship. Maybe he uses his intelligence and strategic thinking to assist Bakugo in battles. For example, he could analyze opponents' weaknesses and come up with battle plans that Bakugo can execute. This would show that even without a quirk, Deku is an important part of their duo.
A common theme is the underdog story. Deku, being quirkless, is the ultimate underdog. He has to fight against the odds and the prejudice of a world that values quirks highly. This makes for a very compelling story as he overcomes these obstacles, often with Bakugo by his side or as his motivation.
Perhaps Deku discovers a dark secret about the origin of quirks and decides that the world would be better off without them. So, he starts a villainous campaign to eradicate quirks. He could form an alliance with other outcasts who have been mistreated due to their lack of quirks or abnormal quirks.
His relationship with his mother would be extremely strained. She might be in denial about her son becoming a villain and try desperately to bring him back to the light. With his former friends like Bakugo, it would turn into a bitter rivalry. Bakugo, who used to bully him, now has to face a much more dangerous and calculating Deku.
One possible plot could be that Villain Deku is on a mission to undermine the hero society and crosses paths with Hero Deku. They engage in a fierce battle where Villain Deku taunts Hero Deku about his ideals. In the end, Hero Deku manages to get through to a small part of Villain Deku's conscience, leaving him with some doubts about his villainous path.
The storyline could be about a quirkless cop who overcomes the odds. In a world full of quirks, he might use his wits and training. He could be solving crimes that are related to quirk - using villains. His journey could show that you don't need a quirk to be a hero.
One great 'My Hero Academia' quirkless badass fanfiction is 'The Quirkless Prodigy'. In this story, the main character uses their intelligence, martial arts skills, and sheer determination to rival the quirk - having heroes. It's really inspiring to see how they overcome the odds in a world that seems to be all about quirks.
I really like the fanfic 'Izuku: The Quirkless Hero'. In this story, Izuku forms a special bond with some of the underdog characters. They work together to create a new style of heroics that doesn't rely on quirks. It also explores his relationship with All Might in a different light, as All Might becomes more of a mentor in non - quirk - related areas.