Maybe a story where Trixx accidentally grants a non - holder some of its powers. This causes chaos as the person doesn't know how to control them properly. The Ladybug and Chat Noir have to figure out what's going on and help the person while also dealing with Hawkmoth's latest scheme.
One idea could be that Trixx gets lost in the human world and has to find its way back to its Miraculous holder. Along the way, it teams up with a human who has no idea about the Miraculous but is kind-hearted and helps Trixx avoid the villains who are also after it for their own devious plans.
One idea could be a story where the Peacock Miraculous has a unique malfunction that causes it to create unexpected akumas. For example, instead of creating the usual villains, it creates akumas that have the power to spread positive emotions but in a chaotic way that still disrupts Paris. Another idea is a fanfiction where the holder of the Peacock Miraculous has to team up with Ladybug and Chat Noir to fight against an ancient evil that is specifically drawn to the power of the Peacock. This could involve exploring the history of the Miraculous and its connection to this new threat.
A great Trixx Miraculous Fanfiction could explore Trixx's past. What was it like before it became a Kwami? How did it come to be associated with the Fox Miraculous? This kind of backstory exploration can add depth to the character and the overall Miraculous universe in the fanfiction world.
One idea could be that Ladybug and Chat Noir are sent to space on a mission to stop an alien villain who is stealing energy from planets. They have to adapt to zero - gravity combat and use their powers in new ways. For example, Ladybug's yo - yo could be used to grapple onto spaceships.
A plot could involve the whole gang from Miraculous Ladybug going camping together. Marinette could be worried about Tikki being discovered in the wild. Meanwhile, Adrien, as Chat Noir, tries to impress Marinette. And during the camping trip, there's a mystery about a strange light in the forest that turns out to be related to an ancient Miraculous. So they all have to work together to figure it out.
A plot idea could be that the Bubbler becomes an anti - hero. He realizes that his way of trapping people in bubbles was wrong, but he still wants to use his powers for good. So he starts using his bubbles to protect people from other villains, like creating a bubble shield around the city when an especially dangerous akuma attacks.
One idea could be that Ladybug and Chat Noir's Miraculous are somehow linked to Pokemon powers. For example, Ladybug's yo - yo could have the ability to capture and communicate with certain Pokemon. Another could be that Hawk Moth is trying to use Pokemon to take over Paris. And perhaps Marinette discovers she has a special connection to a rare and powerful Pokemon that helps her in her fight against evil.
Well, you could write a fanfic where Ladybug and Chat Noir get transported to an alternate universe. In this universe, their roles are reversed, and they have to figure out how to get back to their own world while dealing with the differences. Also, a plot could revolve around a Miraculous that has been lost for centuries suddenly resurfacing, and all the chaos and mystery that comes with it. Maybe a story about Ladybug having to deal with a personal crisis that affects her superhero duties, like losing her confidence after a major defeat.
One idea could be that the Reverser's powers are amplified and he starts reversing not just individual actions but entire relationships in Paris. So, Marinette and Adrien's unspoken bond is reversed, making them avoid each other at all costs. Another could be that the Reverser targets Ladybug's and Chat Noir's memories of their superhero identities, causing chaos as they try to figure out who they are again while still having to fight akumas. A third idea is that the Reverser somehow manages to reverse the concept of good and evil in Paris, making the akumas seem like the heroes and the heroes like the villains, and Ladybug and Chat Noir have to find a way to reverse it back.
A possible plot for the Miraculous Ladybug Glaciator fanfiction is that Glaciator somehow freezes time in Paris, except for Ladybug and Chat Noir. They have to find a way to reverse the time - freeze while also dealing with Glaciator's attacks. Or perhaps Glaciator teams up with another akumatized villain, creating a more difficult situation for our heroes. Also, the fanfiction could explore the relationship between Ladybug and Chat Noir as they are trapped in this frozen - in - time Paris, and how they grow closer or face new challenges in their relationship.
A really cool plot could involve the Puppeteer teaming up with other villains in the Miraculous Ladybug universe. They could form a sort of 'villain alliance' and plan a major attack on Paris. The heroes would then have to figure out how to break their alliance and defeat them. Also, perhaps the Puppeteer discovers a way to use the Miraculous powers for herself without having a Miraculous, which would be a huge threat to Ladybug and Chat Noir.