In some fanfictions, Hawkmoths could be defeated by the combined powers of Ladybug and Chat Noir reaching a new level. Maybe they discover a hidden aspect of their Miraculous that gives them an edge, like a super - charged special attack.
To create a great villain for Miraculous Ladybug fanfiction, focus on their flaws and strengths. Make their actions unpredictable and have them interact with the main characters in interesting ways. Maybe they have a hidden agenda or a secret that's revealed later on.
One way to fake a marriage could be having the characters stage a big fake wedding ceremony with all the trimmings. And they'd have to keep up the act in front of friends and family. Maybe they even have to deal with unexpected challenges that threaten to expose the truth.
There are indeed. Fanfiction writers often come up with creative stories involving the wolf miraculous in the Miraculous Ladybug world. They might explore how a new holder of the wolf miraculous interacts with Ladybug and Chat Noir. It could be about a character who discovers the power of the wolf miraculous and has to learn how to use it to fight against Hawk Moth's akumas. You can also check fanfiction.net for some interesting reads.
The akuma might transform Ladybug's outfit into something dark and sinister, or it could turn it into a costume inspired by a different theme altogether.
To write a good Miraculous Ladybug villains fanfiction, you need to study the existing lore. This helps you stay true to the characters. Also, create interesting relationships between the villains and other characters, like the heroes or other villains. It adds depth to the story.
Creepypasta can add a sense of horror and the macabre to Miraculous Ladybug fanfiction. It might change the tone from the light - hearted and magical feel of the original show to something much darker. For instance, the characters could face more terrifying threats than just Hawk Moth.