The writing style is crucial. A good fanfic will have smooth and engaging prose. It won't be full of grammar and spelling mistakes. For this pairing specifically, the interactions between the two should be believable. They come from different 'universes' within the Undertale multiverse, so how they react to each other's differences and similarities can make or break the story. Also, a bit of humor or emotional depth can really enhance the fanfic.
In a great Underswap Papyrus x Underfell Sans fanfic, the world - building around them can be very important. Since they are from different versions of the Underground, how the author weaves those two settings together can add a lot of richness to the story. For example, if they are in a situation where the rules of both their worlds collide. The fanfic should also make the relationship between them feel organic, whether it's a friendship, a rivalry, or something more romantic. It should progress in a way that makes sense to the reader and keeps them hooked.
The clash of personalities. Underswap Papyrus is usually quite positive and energetic, while Underfell Sans has a more edgy and guarded nature. This contrast can lead to really engaging interactions in the fanfictions.
There are some. You might want to check fanfiction.net as well. However, the quality can vary a lot. Some fanfictions focus more on the relationship development between Underswap Papyrus and Underfell Sans, while others might include more action or adventure elements related to their world.
A common theme is the exploration of differences. Since they are from different universes, their personalities and ways of life are different. Fanfics often focus on how they deal with these differences.
The plot matters a great deal. It could be about their adventures in the Underswap world, or it could be a more emotional story about how they deal with the changes in their relationship due to the swap. A good plot keeps the reader engaged, whether it's full of action, humor, or heart - felt moments. For instance, a plot where they have to work together to save their swapped world from a threat would be exciting.
You can start by looking on fanfiction platforms like Archive of Our Own (AO3). There are often specific tags for Underswap and Underfell. Just search for 'Underswap Papyrus x Underfell Sans' in the search bar, and you'll likely find a variety of fanfics. Another option is to check out Tumblr. Some fans post links to their fanfics there or even post short fanfic snippets that might lead you to the full stories.
Characterization is key. A good fanfic should accurately portray the personalities of both Underswap Sans and Underfell Sans. Their unique traits, like Underswap Sans' more positive and friendly nature compared to Underfell Sans' tougher exterior, should be well - presented.
One popular 'underswap sans x underfell papyrus fanfic' is 'A Tale of Two Skeletons'. It has an interesting plot that explores their unique relationship in a creative way. The author does a great job of portraying their personalities.
There's also 'Unexpected Encounters'. This fanfiction delves deep into how underfell sans and underswap papyrus might interact. It starts with a chance meeting and then unfolds into a story full of twists and turns. Their personalities are really brought to life in this one. It shows how they overcome differences and form a special connection.
The contrast between the two characters. Underswap Sans is more laid - back and friendly compared to Underfell Sans who is more rough and edgy. When they interact in fanfictions, it creates a lot of interesting dynamics, like how they might clash or gradually understand each other.
One common theme is friendship. Despite their differences from different AU's, they often form a unique bond.