A great plot could be centered around chibi Allen Walker's origin. What if there was a secret about his birth or how he became an exorcist that is only now starting to surface? He could start having strange dreams that lead him to investigate his past. Or perhaps he is framed for a crime he didn't commit within the Order, and he has to prove his innocence while still dealing with the normal Akuma threats. He might also have an encounter with a friendly Akuma who has some information about his family.
Well, here's a plot idea. Chibi Allen Walker accidentally loses his Innocence in a comical way, like it gets stuck on a tree branch while he's chasing a small Akuma. He then has to go on a mini - adventure to retrieve it. Along the way, he meets some strange creatures that are neither Akuma nor human. They offer to help him if he can solve a riddle for them. Another plot could be that he enters a competition within the exorcist community, a chibi - sized competition of skills and strength, and he has to use his wits and unique abilities to win against some tough opponents.
One plot idea could be that the chibi Allen Walker discovers a hidden power within himself while on a simple mission. Maybe he stumbles upon a mysterious artifact that unlocks a new form of his Innocence. Another idea is that he gets transported to a parallel world where everything is in miniature like him, but there are different rules and he has to figure out how to get back. And also, a plot where he befriends a group of other chibi exorcists and they form a special team to take on a powerful Akuma that no one else could defeat.
One possible sidekick could be Miranda. Her clumsy yet endearing personality would make for some interesting interactions with chibi Allen Walker. She could also use her time - reversing Innocence to get them out of some tight spots. Then there's Bookman. Bookman's vast knowledge could be invaluable to chibi Allen Walker. He could guide him on different missions and help him understand the deeper secrets of the exorcist world. Also, Krory could be a sidekick. His vampire - like abilities and his journey to control his bloodlust could be a source of both drama and friendship for chibi Allen Walker.
A more emotional plot idea could be August Walker falling in love, which would be very complex as his dangerous lifestyle and secrets would constantly be at odds with his feelings. This could lead to a lot of internal conflict and difficult decisions.
A crossover with the world of Fullmetal Alchemist would also be cool. Allen could meet the Elric brothers. His Exorcist abilities might be seen as a form of alchemy by some in that world. They could all work together to uncover a conspiracy that involves both the Homunculi and the Millennium Earl.
Well, a possible plot for a Tyki Mikk x Allen Walker fanfiction could involve a situation where Tyki is injured and Allen has to take care of him. This could lead to a lot of tense moments as Allen is not sure if he can trust Tyki, but at the same time, he can't just let him die. Also, a plot could revolve around them being captured by a common enemy and having to work together to escape. Or perhaps a story where they both get transported to a different dimension and have to rely on each other to find their way back while also dealing with their own personal demons.
One plot idea could be a story where Tyki Mikk and Allen Walker are forced to team up against a common enemy greater than their differences. Maybe a new, extremely powerful Akuma that threatens to destroy both the Order and the Noah's side. This would put them in a situation where they have to rely on each other's unique abilities.
One interesting plot could be that chibi Naruto and chibi Sasuke get lost in a mysterious forest together. They have to work as a team to find their way out, which is a big challenge since they are so young. Along the way, they discover a strange creature that seems friendly at first but then turns out to be a bit of a trickster. Another plot could be a day - in - the - life kind of story where they are at the ninja academy and get into all sorts of silly mischief, like pranking their teachers or competing in a very unorthodox mini - ninja competition among the students.
Well, you could have a story where all the RWBY characters swap their semblances for a day in chibi form. Ruby with Weiss's glyphs, Weiss with Blake's shadow clones, Blake with Yang's strength, and Yang with Ruby's speed. It would lead to some really funny and unexpected situations as they try to go about their normal activities at school. Or perhaps a fanfiction where the chibi RWBY teams are transported to a world made entirely of sweets. They have to resist the temptation to eat everything while also finding a way back home. A third option might be a mystery plot. A valuable item has gone missing in Beacon's chibi - version campus, and the teams have to solve the mystery of who took it and why.
Some fanfictions may focus on Allen Walker's relationship with a particular vampire. For example, they could start as enemies but gradually develop a deep bond as they understand each other's motives and the difficult situations they are in.
One interesting Allen Walker fanfiction could be about his further adventures in a world where the Earl has been defeated but new threats emerge. It might explore his relationships with the other exorcists in a more in - depth way, like how he and Lavi become even closer friends and partners in maintaining the new - found peace.
One idea could be that Chibi Sakura accidentally stumbles upon an Akatsuki hideout while on a solo adventure. She's initially scared but then tries to use her charm and intelligence to befriend some of the members, like Deidara, who is intrigued by her spunk. Another plot could involve Akatsuki being tasked with capturing Chibi Sakura for some reason, but she outsmarts them at every turn. For example, she uses her medical ninjutsu skills to create illusions that confuse them.