What are some interesting cross sans crossover fanfiction ideas?

One idea could be a crossover where Sans from the game enters a human world during a major historical event like the Industrial Revolution. He could interact with inventors and workers, his magic and unique personality causing all sorts of comical and thought - provoking situations.

A 'seraphim sans crossover fanfiction' could involve a crossover with a space - opera setting. Imagine Seraphim Sans traveling through the galaxy, meeting different alien species and getting involved in interstellar politics. His character would add an interesting dynamic to the high - tech and often morally complex world of space - opera. He might be a key figure in a war between different star empires or help broker peace.

One interesting sans crossover fanfiction could be where Sans from Undertale crosses over with the world of Harry Potter. He might use his unique abilities like teleporting to surprise the wizards in Hogwarts. Another could be a crossover with the Pokémon world, where Sans teams up with Pikachu. Maybe he'd use his bone attacks along with Pikachu's electric shocks to battle villains.

One interesting concept could be how Sans' unique abilities from his original game would interact with the RWBY universe. For example, his teleportation might be a new and unexpected skill in RWBY battles. Another concept could be the character interactions. Sans' laid - back personality could create some really fun and comical exchanges with the more serious or energetic RWBY characters like Ruby or Weiss.

First, decide which two universes or characters you want to cross with Sans. This is crucial as it will set the tone and direction of your story. Then, do some research on both. If it's a crossover with a game or a book you're not familiar with, make sure you know the basic rules, settings, and character traits. For example, if it's a crossover with a Final Fantasy game, understand the magic system and the different races.

One idea could be exploring the backstories of minor characters. For example, you could focus on the character of Radius and create a story about his life before he joined the Acacia Dragoons. Another idea is to create an alternate ending for the game. Maybe in your fanfiction, the characters are able to prevent the destruction of the world in a different way than in the original game. You could also write a fanfiction that focuses on the relationship between Serge and Kid, and how it develops further after the events of the game.

One common theme is friendship. Since they are from different 'worlds' in the Undertale AU, their journey to become friends is often explored. Another theme is redemption. Sometimes Cross Sans might have a troubled past and Dream Sans helps him find a new path.

Power dynamics is also a frequent theme. Nightmare Sans is often depicted as very powerful, and Cross Sans has his own set of powers. Fanfictions might explore how they use or abuse their powers in relation to each other. It could be a power struggle, or they could end up combining their powers for some greater purpose.

One interesting idea could be a crossover with "Moana". Elsa's ice powers and Moana's connection to the ocean could create a really cool dynamic. Maybe Elsa accidentally freezes part of Moana's ocean and they have to work together to fix it. Another could be with "Tangled". Rapunzel's long hair and her adventurous spirit combined with Elsa and Anna's journey in Frozen 2 would be exciting. Rapunzel could use her hair to help them climb mountains or cross chasms. A third idea is a crossover with "Beauty and the Beast". Belle's love for books and knowledge could help Elsa understand more about her powers and the history of magic in the Frozen world.

A plot idea could revolve around the discovery of the pregnancy. Maybe it was unexpected, and they initially panic. But then, as they start to think about it more, they get excited. They could start making plans like decorating a nursery in their unique Underground home. There could also be a plot where they face some sort of danger during the pregnancy that they have to overcome together.