I'm not very familiar with 'asriel butt fanfic' specifically, but in general, fanfic can have themes like friendship, adventure, or self - discovery. Maybe in this type of fanfic, there could be themes related to the character's growth or relationships within the story's context.
Since I don't have in - depth knowledge of 'asriel butt fanfic', we can assume that it might follow some of the common trends in fanfic. It could have themes of overcoming challenges. For example, the character Asriel might face difficulties and through his journey, learn important lessons. Also, themes of loyalty among the characters in the fanfic could be present.
I would say it's probably not appropriate. Just from the title, it gives off an impression that it might contain content that is not suitable for a general audience. The use of 'butt' in the title makes it seem like it could be vulgar or at least contain content that is not in good taste.
Since I've never come across this 'asriel mspaintguy butt fanfic' before, it's difficult to give a detailed account. However, if we break down the elements, 'Asriel' might be a character name, 'Mspaintguy' another, and the use of 'butt' makes it seem like it could be a rather strange or comical fan - made story that might involve some sort of physical or situational humor related to that body part. But again, this is all speculation.
I'm unable to tell you the plot as this fanfic title seems rather strange and I'm not familiar with any such work. Fanfic plots are usually based on established characters and universes in positive ways, and this doesn't seem to fit that mold.
Friendship is a very common theme. Since Chara and Asriel are so close in the original story, many fanfics explore the depth of their friendship, how they support each other and grow together.
One common theme could be power dynamics. Since Asriel is in a dominating position, it often explores how power is exerted and how Frisk reacts to it. Another theme might be character growth. Frisk could potentially grow in the face of this domination, either by learning to resist or by finding a new way to interact with Asriel.
Another theme is redemption. Asgore might have made some mistakes in the original story, and in these fanfics, Asriel can play a role in his redemption process. It shows how love and family can be a driving force for change. For example, in some fanfics, Asriel helps Asgore come to terms with his past actions and move towards a better future. This often involves a lot of emotional conversations and growth for both characters.
I'm sorry, but I'm not aware of any specific 'Asriel Butt Sissy fanfic'. It might be a very niche or even inappropriate topic. It's better to focus on positive, family - friendly fanfics.
I don't really engage in promoting or having a collection of 'asriel butt fanfic'. It would be better if you joined some relevant fan communities, for example, on Reddit there might be groups dedicated to the source material of this fanfic. There, you can ask for recommendations from other fans who are more likely to know some great 'asriel butt fanfic'.
Common themes include loyalty. Chara and Asriel had a strong bond, and fanfics often showcase how loyal they are to each other, even in difficult situations. Another is the theme of discovery. They discover new things about themselves and each other through their interactions in the fanfics. Also, the theme of hope can be seen. In a world that can be dark like undertale, their relationship can be a source of hope, and fanfics play with this idea, showing how they bring light to each other's lives.
Often, the theme of empowerment is present. Female Asriel is usually depicted as strong and capable in these fanfictions. For example, she might be the one to save the day in a dangerous situation. Also, the theme of family can be explored, especially in relation to her existing family in the original story and how it might be different for a female version.