There's also the 'Mentor - Student Relationship' trope. Izuku might have a relationship with a martial arts master who teaches him the ways. This could be an original character or an existing character from the series. This trope allows for a lot of character development and exploration of different martial arts philosophies, which adds depth to the story.
One popular trope is the 'Training Montage'. In these stories, Izuku goes through intense martial arts training, often with a strict mentor. It shows his growth and determination as he hones his skills. Another is the 'Underdog Triumphs' trope. Since Izuku is already an underdog in the original series, adding martial arts to his arsenal and then using it to overcome stronger opponents is a common and exciting plot.
Katsuki Bakugo can be a popular character in izuku martial arts fanfiction. He might start as a rival in martial arts training, constantly challenging Izuku to improve. Their competitive relationship adds a lot of drama and tension to the story.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just search for 'Izuku knows martial arts' in their search bars, and you'll likely find a variety of stories with different takes on Izuku having martial arts skills. Some might focus on how he combines it with his existing powers, while others could be about him using martial arts in a more street - level combat scenario.
A common trope is the 'Mentor - Student' relationship. Captain America often takes on the role of teaching Izuku about leadership, courage, and combat skills. For example, in many fanfics, he helps Izuku become more confident in his abilities.
One popular trope is the 'Training Montage'. Writers love to show Izuku going through intense training to become a stronger hero. It gives a sense of his determination and growth. Another is the 'Underdog Triumphs' trope. Since Izuku starts as an underdog in the original story, this is often carried over and amplified in fanfiction. He might defeat a powerful villain against all odds. And the 'Found Family' trope is also common. Izuku forms strong bonds with his classmates or other heroes, and these relationships are explored in depth, showing how they support and grow with each other.
In My Hero Academia Izuku Harem Fanfiction, the 'accidental closeness' trope is quite prevalent. For example, Izuku might accidentally fall on one of the girls in the harem, leading to an embarrassing yet cute moment. There's also the 'rivalry - turned - love' trope. Some of the characters who initially see Izuku as a rival might later develop feelings for him and join the harem.
The 'Underdog to Hero' trope is also common. Even when Izuku has a new quirk, he often starts off being underestimated. He has to prove himself not only to his classmates but also to the heroes around him. This trope is great for character development as we see Izuku grow in confidence and skill.
There are fanfictions where Izuku travels to a different dimension to learn martial arts. In this new world, he has to adapt to different fighting styles and philosophies. He could meet mentors who teach him the secrets of martial arts that are unknown in his own world. This not only makes him a better fighter but also changes his perspective on heroism.
In 'Boku no Hero Academia Izuku x Harem Fanfiction', a popular trope is the 'fish - out - of - water' situation. Since Izuku is suddenly surrounded by a group of girls interested in him, he may find himself in awkward or unexpected social situations. Also, the 'shared secret' trope can be seen. Maybe they all share a secret related to their quirks or a hidden mission, which binds them closer together as a harem. Additionally, the 'jealousy' trope is often present, with the harem members getting jealous of each other's time with Izuku.
The 'Mentor Figure' trope is also quite common. Given the power of the lightning quirk, Izuku usually needs someone to guide him. This could be an older hero or even a mysterious stranger. The mentor helps him understand his quirk better, trains him in combat techniques that are specific to his lightning - based powers, and also gives him moral support. This trope adds depth to the story as it shows Izuku's growth not just in terms of power but also in character.
One interesting story could be about Izuku Midoriya learning a unique martial art that gives him an edge in the hero world. For example, he might discover an ancient martial art that focuses on using the opponent's energy against them. This could add a whole new dimension to his fighting style and his journey to become a great hero.