Perhaps the fanfic explores the development of new weapons or techniques. The Splatoon Army, with their military - inspired mindset, could be constantly innovating. Aloha, on the other hand, might bring in his own creative and unorthodox ideas. They could combine their efforts to create a super - effective weapon that changes the way battles are fought in the Splatoon universe within the context of the fanfic.
Obviously, Aloha is one of the main characters. He is known for his unique style and skills in the Splatoon world. As for the Splatoon Army, there are likely to be some key soldiers or officers. Maybe there's a tough sergeant - type character who is all about discipline and order, and he has to deal with Aloha's more free - spirited nature.
One interesting aloha pokemon fanfic could be about a trainer's journey in the Alola region with a Pikachu that has unique abilities. Maybe it can communicate telepathically with other pokemon, which gives the trainer an edge in battles.
There are fanfictions that focus on the backstories of the existing characters in Splatoon 2. For example, a story about how Agent 3 became such a skilled fighter. It could involve their early training days, the challenges they faced, and how they overcame them to become one of the top agents in the game.
One popular 'exol x army fanfic' might be those that focus on the friendship or a fictional romantic relationship between members of EXO - Ls (EXO fans) and ARMYs (BTS fans). For example, stories where fans from both fandoms meet at a concert and form a special bond. There are also fanfics that create a fictional world where EXO and BTS collaborate, and their fans' interactions are a big part of the plot.
One idea could be that the Hypnoshades have a hidden power that only a select few inklings can unlock. And this discovery leads to a race among different teams to find out more about it.
One interesting Splatoon fan fiction could be about a young Inkling who discovers a hidden power within the ink. For example, they might find that they can use the ink to create portals to different parts of the Splatoon world. This would lead to all kinds of adventures as they explore new areas and meet different characters.
One great 'Splatoon love fanfic' is the one where the Inkling girl and boy from different teams gradually fall in love during a friendly turf war tournament. Their love blossoms as they discover their shared love for unique ink colors and creative strategies.
One idea could be a story where the inklings and octolings have to put aside their differences during a world war - like situation. They could form an alliance to fight against a common enemy that threatens both of their species. Maybe this enemy is a new type of sea creature that has been mutated by some sort of toxic waste and has a powerful army.
The fanfiction could revolve around a new character who has the ability to traverse between the Splatoon and Persona 5 worlds. This character discovers a conspiracy that if not stopped, will merge the two worlds in a disastrous way. The character enlists the help of both the Inklings and the Phantom Thieves. They have to overcome their differences in fighting styles and cultures to save both their worlds. The inklings' turf war strategies could be adapted to the battles in the Metaverse, and the Phantom Thieves' stealth could be useful in the Splatoon world.
Another theme is adventure. They often go on adventures together, exploring new areas of the Splatoon world or trying to solve a big problem. This could be something like finding a lost relic or stopping a new threat to their world. In these adventures, their relationship grows as they rely on each other.