In terms of the plot of such a fanfiction, it could involve them teaming up against a common enemy. Maybe they have to face some sort of interdimensional threat. Their different abilities, Dave's with his time - related powers and Sans' bone attacks and teleportation, would make for an exciting combination in battle.
The interactions between Sans and the characters from the other crossover element are very important. For example, if it's a crossover with a fantasy world, how does Sans interact with the magic - using characters? Does he use his own unique skills to complement or contrast with them? Another aspect is the world - building. How well does the author create the new combined world? Is it believable and immersive?
Yaoi fanfiction often focuses on romantic or sexual relationships between male characters. In the case of 'asylumtale sans x grillby', it might explore their unique dynamic within the Asylumtale universe. The fanfiction could delve into their personalities, how they interact, and perhaps how their relationship develops over time. It might also play with the specific traits and backstories given to these characters in the Asylumtale lore.
I'm not entirely sure about the specific significance of 'undercove sans' in error yaoi fanfiction. It could be a unique or made - up element within a particular subset of that fanfiction genre.
The theme of adaptation also fits. They are in an unfamiliar situation, meeting a character from a completely different world. So, they have to adapt to each other's presence, ways of thinking, and powers. This process of adaptation can drive the story forward and also show how characters can grow and change in new and unexpected situations.
One popular sans the skeleton crossover fanfiction is 'Underfell x Undertale: Sans Swap'. It offers an interesting take on character swaps between the two universes. The story plays with the personalities and relationships in a unique way.
One common theme could be the relationship dynamics between the characters. In yaoi - inspired fanfiction, there is often a focus on the romantic and sometimes complex relationship between the two male characters. Another theme might be the exploration of the 'dusttale' universe within the context of this relationship. For example, how the events in the 'dusttale' world affect their relationship.
I'm not very familiar with this specific 'ok ko magic skeleton x yaoi fanfiction', but generally in yaoi fanfiction, there are often complex relationships between male characters, with themes of love, friendship, and sometimes drama.
There are many fan - created works out there, but when it comes to 'dusttale sans x yaoi fanfiction', it's important to note that it's a very specific niche within the fanfiction world. You could start by joining some 'dusttale' - related fan communities on social media platforms. These communities often share and discuss their favorite fanfictions. They might be able to point you in the right direction towards some great 'dusttale sans x yaoi' stories. Also, when you do find a story, make sure to respect the author's work and any rules regarding sharing and distribution.
One possible theme could be love in a desolate setting. Asylumtale likely has a rather dark and unforgiving environment, and the relationship between Sans and Grillby could be a glimmer of hope or warmth in that world. Another theme might be the power of connection. Despite their differences, they find a bond with each other.