You could also look on Wattpad for Deku notebook fanfiction. There might be some stories where the notebook has some sort of magical or special property that helps Deku in his hero training. For example, it could glow when there's a nearby threat or show hidden messages that lead him to new adventures.
I'm not sure about the most popular ones specifically, but you can check fanfiction websites like Archive of Our Own. Just search for 'Deku notebook' and you'll likely find a bunch of different stories. Some might focus on the notebook as a tool for Deku to study his classmates' Quirks in more depth.
One interesting Deku notebook fanfiction could be about Deku using his notebook to discover new and unique Quirks. For example, he might find a forgotten or rare Quirk written in the notebook that gives him an unexpected edge in a battle against a powerful villain.
New characters can also become popular in the notebook fanfiction. These could be characters introduced to create more drama or to help Noah and Allie in their relationship. For example, a mysterious stranger who comes to town and has some kind of connection to their past or future, and this new character's presence shakes up the story in an interesting way.
Deku is a very popular character. His journey from being an underdog to a hero is inspiring. Fanfiction allows fans to explore different aspects of his character, like what if he had made different choices or had different powers. It gives fans a chance to be creative and expand on the story they love.
Well, it's popular because it taps into real - life issues like bullying. Many readers can relate to Deku's experiences on some level. Also, it creates a sense of drama and tension. We as readers are rooting for Deku to come out on top, and the whole process of seeing him deal with the bullies and grow stronger is very engaging. Moreover, it gives fanfiction writers a chance to put their own spin on the character and his backstory, which is always exciting for the fandom.
One popular Deku snaps fanfiction might be those that explore his growth in power. For example, there could be a story where he snaps after seeing his friends in danger and unlocks a new level of his Quirk. It's exciting to see how the author interprets his character in such intense situations.
One popular 'sick deku fanfiction' might be those where Deku has to overcome a mysterious illness while still trying to be a hero. For example, there could be a story where he gets a quirk - related illness that affects his ability to use One For All properly. He has to figure out how to deal with it without his friends finding out at first, which adds a lot of drama to the plot.
One popular pet deku fanfiction might be those where Deku is transformed into a small, cute animal and has adventures with his friends in that form. For example, he could be a kitten and his friends take care of him while he still has his heroic heart. Another type could be where Deku discovers a magical pet that gives him new powers to fight villains.
One popular 'deku dies' fanfiction might be those that explore the impact of his death on the other characters in the My Hero Academia universe. For example, it could show how his friends like Bakugo or Ochaco react to his sudden demise. They might struggle with guilt, as in some stories Bakugo has bullied Deku in the past. His death could also be a catalyst for change in the hero society, making heroes reevaluate their values and the way they protect civilians.
One popular 'dark deku fanfiction' might be those where Deku turns against the hero society due to being constantly underestimated. In these stories, he could use his intelligence in a more devious way, perhaps forming his own group to challenge the established order.
Many 'pregnant deku fanfiction' works also delve into the relationship between Deku and the mother - how they met, how their relationship evolved, and how they are preparing for the new addition to their family. This can add a lot of emotional depth to the story.