Fanfiction ideas combining Miraculous Ladybug and The Little Mermaid

In a fanfiction, the Akumas from Miraculous Ladybug could start to appear in the Avengers' world. The Avengers are initially confused by these strange creatures but quickly realize they need to work with Ladybug and Cat Noir to stop Hawk Moth, who has found a way to cross dimensions. The combined forces would make for an exciting story, with each character bringing their unique abilities to the fight.

One idea could be a crossover where Ladybug and Cat Noir end up in the world of Steven Universe. They could team up with Steven and the Crystal Gems to fight a common enemy that has the power to disrupt both their universes.

A great fanfiction concept could involve a magical accident that transports Marinette (Ladybug) to the world of Wonder Woman. There, she has to learn to adapt to the new environment while also helping Wonder Woman deal with a threat that only Ladybug's unique powers can assist with. For example, a villain who can create illusions that are so powerful, only Ladybug's Lucky Charm can break through them. And in the process, Marinette discovers new aspects of her own powers.

One idea could be that Ladybug and Chat Noir are called to solve a mystery in Paris that seems to have ties to an old case of Sherlock Holmes. They could find a diary or an artifact from Holmes' era that holds the key to the mystery. Maybe the villain they are facing is using a method inspired by one of Holmes' enemies.

One idea could be that the Phantom, with his mastery over music, somehow finds himself in the underwater world of The Little Mermaid. He might be intrigued by the mermaid's unique voices and decides to create a grand underwater opera with them. The mermaid protagonist could be both fascinated and a bit scared of this strange, masked figure from the surface world.

One possible title could be 'The Little Competition in Miraculous Paris'. It gives a clear indication of the setting (Paris from Miraculous Ladybug) and the main theme which is the competition.

One great fanfiction could be where Marinette discovers she has mermaid powers while still being Ladybug. It might start with her finding a strange shell that gives her the ability to transform into a mermaid. In the story, she could use her mermaid form to access new parts of Paris that are underwater, like hidden caves. This would add an exciting new dimension to her adventures as Ladybug and also her relationship with Adrien. Maybe she has to keep her mermaid identity a secret from him at first, which would create some interesting drama.

A new villain could have a weapon that specifically targets Ladybug's powers. When she tries to use her yo - yo or her powers of creation, it backfires and causes her harm. This would force her to rely on her wits and Chat Noir more than ever. They would need to find a way to neutralize the weapon and heal Ladybug.

One idea could be a story where Mylene uses her acting skills to help Ladybug and Chat Noir in a different way. Maybe she pretends to be a decoy to draw out an akumatized villain. It could show her courage and her ability to think on her feet.

Let's say that the Kwamis have some sort of connection to the magic in the ocean. Tikki could have the power to grant Ariel temporary powers on land similar to how she gives Marinette her powers. And Plagg could befriend Sebastian the crab and together they cause some comical chaos while also helping to protect the underwater realm from threats. The characters of Miraculous Ladybug could bring their own unique powers and personalities to the story of The Little Mermaid, adding new layers of adventure and friendship.