One popular trope is the 'fish out of water' scenario. The reader, often being from a different world or just not used to the Underswap universe, has to adapt, and Papyrus helps them. Another is the 'unlikely friendship/romance' trope, as Papyrus' exuberant personality might seem at odds with the reader at first.
Underswap Papyrus is an interesting character. In fanfiction with a reader, it often explores a unique relationship. The fanfictions might show his charming, kind and sometimes goofy side. It could be about an adventure where he and the reader go through challenges together, or just a slice - of - life story where they get to know each other better.
Well, a common trope is the 'comfort trope'. In these fanfictions, Papyrus offers comfort to the child reader when they're sad or scared. He might give them a big, warm (as warm as a skeleton can) hug. Also, the 'growth trope' is seen often. The child reader grows in character, learning important values with Papyrus as their guide. This can include things like learning to be brave or how to make friends. Lastly, the 'gift - giving trope' where Papyrus gives the child little presents, like a cool rock he found or a handmade item, to show his affection.
One great idea for a fanfiction could be a story where Underswap Sans and Underswap Papyrus go on an adventure in the Underground. Maybe they encounter a strange new monster that no one has ever seen before. They have to use their unique abilities to figure out how to deal with this new threat.
A plotline could be that they discover a hidden part of the Underground. This new area could have different rules and strange creatures. They have to adapt quickly to survive and also figure out how this new place relates to the rest of the Underground.
Common themes include loyalty. They are extremely loyal to each other in most fanfics. Another one is the theme of overcoming challenges. Whether it's dealing with other characters or facing difficulties in their world, they work together to overcome them. There's also the theme of fun and humor. Their interactions are often filled with jokes and light - hearted moments, which makes the fanfics enjoyable to read.
One common theme is friendship. Since they are different characters in the Underswap, exploring how they become friends is popular.
One common theme is the exploration of differences. Underfell sans and underswap papyrus are from different universes with distinct personalities. Fanfictions often focus on how they deal with these differences, like underfell sans's more aggressive nature compared to underswap papyrus's more positive and energetic self.
One popular trope is the 'Forced Proximity'. For example, Masky and the reader might be trapped in a small space together, which forces them to interact and get to know each other on a deeper level. Another is the 'Mysterious Protector' trope, where Masky secretly looks out for the reader, and the reader gradually discovers this. It adds an element of mystery and intrigue to the story.
The 'redemption' trope can also be found in vanitas x reader fanfiction. The idea that the reader might be the one to bring out the better side of Vanitas. Or the 'shared destiny' trope, where the two are fated to be together for some grand purpose. These tropes add depth and interest to the fanfiction stories.
There's also 'Swap Brothers' Bond'. This fanfic delves deep into the brotherly bond between Sans and Papyrus in the Underswap setting. It shows their daily adventures and how they support each other. The author does a great job of capturing the essence of their swapped selves, and it's full of humorous and touching scenes.