What are the common themes in Cross Sans x Nightmare Sans Fanfiction?

One aspect to consider in this fanfiction could be the unique dynamic between Nightmare Sans and Cross Sans. Their personalities are quite different. Nightmare Sans is often associated with negative emotions and a more menacing presence, while Cross Sans has his own complex backstory. In the fanfiction, they might interact in ways that explore themes of redemption, power struggles, or unexpected alliances.

The popularity might be due to the contrast between the two characters. People are drawn to the idea of seeing how a 'dark' character like Nightmare Sans and a more 'conflicted' character like Cross Sans interact. It creates a lot of room for interesting scenarios.

One common theme is power. Both characters are quite powerful in their own right, and fanfictions often explore how their powers interact. Another is the idea of redemption or the lack thereof. Since they are not exactly 'good' characters, some stories might play with the concept of them finding a way to be better. And of course, there's the theme of their relationship, be it a partnership, a rivalry, or something in between.

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.

One common theme is the struggle between good and evil, as Dream Sans is often associated with positive aspects and Nightmare Sans with negative ones. Their relationship in fanfics can explore how they deal with their opposing natures.

You can try looking on Archive of Our Own (AO3). It has a large collection of fanfictions, and you're likely to find some great Cross Sans x Nightmare Sans fanfictions there. Just use the search function and type in the relevant tags.

In 'cross sans x cross chara fanfic', a common theme is the exploration of the characters' backstories. Since both cross sans and cross chara have their own histories in the Undertale lore, fanfic writers might delve into these backstories to create more depth in their relationship. Another theme can be redemption. If either character has made mistakes in their past, the fic could focus on their journey towards redemption. And of course, there is always the theme of the relationship between the two characters, whether it's a platonic bond or something more complex that develops over the course of the story.

One great Dream Sans x Nightmare Sans fanfiction is 'The Dual Existence'. It beautifully explores the complex relationship between them. The story dives deep into their opposing natures yet shows how they are also two sides of the same coin. It has some really well - written dialogue that gives a great insight into their characters.

The plot also matters. It could be about their rivalry, or a journey towards understanding each other. For instance, a plot where they are forced to team up against a common enemy can be really engaging. This not only shows their individual strengths and weaknesses but also how they can complement each other in a way.

Yes, there are quite a few. You can check out some fanfiction platforms like Archive of Our Own. There you might find various stories exploring the relationship between Killer Sans and Nightmare Sans. Some might focus on their adventures together in the alternate universes of the Undertale fandom.