A plot idea could involve a mystery in the Loud House. For example, a valuable family heirloom goes missing and all the characters have to work together to find it. It could show different sides of each character as they search different parts of the house and interview each other. And also, a fanfic could be about a character from the Loud House getting superpowers and how they use them to protect their family and the neighborhood from a new threat.
Well, you could have a fanfic where the Loud family goes on an unexpected adventure outside of Royal Woods. Maybe they end up in a strange, magical land where the rules are different. The kids have to learn new skills to survive and get back home. This could lead to some really interesting character development as they face challenges they've never had to deal with before.
One idea could be a time - travel plot where a character from the Loud House goes back in time and has to deal with changes in the family's history. Another could be a 'what if' scenario, like what if Lincoln had a different set of sisters. Maybe he could have all older sisters and the story could explore how that dynamic changes things.
Another plot could involve a love triangle among the Loud siblings' friends. They all end up at the Loud House often, and the love triangle causes some tension. But through various events at the house, like parties or family outings, they start to understand each other better and resolve their differences in a really sweet way.
A possible plot could involve a mystery that the characters from both series need to solve together. The Loud House kids' knowledge of their town and the Recover Girls' special abilities would combine to uncover a hidden secret in their shared universe. For instance, there could be strange disappearances in Royal Woods that the Recover Girls' powers of recovery and the Louds' determination can help figure out.
Maybe Linkin is from a different dimension and he accidentally lands in the Loud House world. He and Lily form a unique bond as he tries to find his way back home. They go on adventures together in the neighborhood, with Lily showing Linkin all the local quirks and Linkin teaching her some of his world's secrets.
Lincoln is often a popular choice. He's the main character in the show and has a lot of relatable experiences. People like to explore different versions of his life and relationships. Another popular one is Luna. Her cool rocker personality gives a lot of room for interesting stories, like her going on a big music tour or meeting her idol.
One idea could be that Lincoln Loud discovers a rare and powerful Pokemon in Royal Woods. He then has to keep it a secret from his sisters while training it. Another could be the Loud sisters each getting a Pokemon that reflects their personalities. For example, Lola might get a Jigglypuff because it's cute and girly.
A cool plot for 'the loud house crossover fanfiction' might involve a crossover with 'My Little Pony'. The ponies could come to Royal Woods, and the Loud sisters could be fascinated by their magic and cuteness. Lincoln might have to figure out how to get the ponies back to Equestria while also dealing with his sisters' excitement. Or perhaps the Loud family travels to Equestria and has to adapt to a world ruled by ponies.
One idea could be that Naruto somehow ends up in the Loud House world. Maybe he's on a mission and a strange jutsu goes wrong, transporting him there. He could use his ninja skills to help the Loud siblings out with their daily problems, like getting rid of a bully at school using his shadow clone jutsu.
One idea could be that the Loud family members gain superpowers similar to the Avengers and have to team up to save Royal Woods from an alien invasion. For example, Lincoln could be like Captain America, leading the group with his strategic mind.
Maybe the Loud siblings could be transported to the TMNT universe. The boys would be fascinated by the Turtles' ninja skills and gadgets, and the sisters could use their own unique skills to help the Turtles in their fight against the Foot Clan. For example, Lola could use her pageant charm to distract the bad guys, while Lincoln could bond with the Turtles over being part of a big group.
Maybe the girl is an aspiring artist and Jordan is a great critic. In the fanfic, Jordan helps the girl improve her art skills, and in return, the girl helps Jordan overcome his stage fright when he has to present his art critiques in public. It's a story of mutual growth and support.