Well, a popular plotline is the exploration of their different powers. Frisk has their unique abilities and Betty has hers. In some fanfictions, they end up teaching each other about their powers. Also, there could be a plot where Frisk and Betty are from different timelines that somehow merge. This creates a lot of tension and also opportunities for their relationship to grow as they navigate this new, chaotic situation.
Writers often start with conflict. Since Betty is usually seen as a bit of a bad girl in Glitchtale, there's an initial tension with Frisk. They might make Frisk be the one to break through Betty's tough exterior. For example, Frisk could save Betty's life in a dangerous situation, which makes Betty start to question her views on Frisk.
Glitchtale Fanfic is fan - made fiction related to Glitchtale. It often features unique storylines, character developments, and interpretations that are different from the original Glitchtale. Fans create these fanfics to explore new ideas, relationships between characters, and sometimes to expand on the Glitchtale universe in ways they would like to see.
Asgore would be deeply affected. He has a complex relationship with Frisk, but ultimately he doesn't want harm to come to them. His reaction could be one of shock and regret. He might see this as a sign that his rule over the Underground has failed in some way. Flowey, depending on his state of mind in the fanfiction, could also have a strong reaction. If he has any positive feelings towards Frisk left, he'd be either very sad or extremely angry, and might try to manipulate the situation to his advantage.
You can find Glitchtale Fanfic on various fan - fiction websites such as Archive of Our Own (AO3) or FanFiction.net. These platforms have a large collection of fan - made stories, including those related to Glitchtale.
There's also a chance he would be worried and a bit scared. They are both young, and he may be concerned about whether they are ready for this big step. He might worry about how they will afford to take care of a baby and still pursue their own dreams.
A frisk novel could refer to a type of novel that has a lot of brisk or lively elements in it, perhaps in terms of the plot which moves quickly, the characters who are energetic, or the writing style that is dynamic and engaging.
I think young Sasuke would have a very intense reaction. He was so consumed by his hatred for Itachi at that young age. A Sasuke vs Itachi fanfiction would be like a trigger for him. He would be eager to see how the fictional fight is portrayed. If Sasuke in the fanfiction is shown as strong, it might fuel his own ego and make him strive even harder to become powerful. However, if the fanfiction shows Itachi as superior, it could enrage him. He might feel that it undermines his own goal of defeating Itachi and he might even want to find the writer to correct their 'wrong' view.
One possible plot could be that the characters from Glitchtale end up in the world of Percy Jackson. Maybe Betty, from Glitchtale, could be mistaken for a new type of monster by the demigods. The demigods then have to figure out whether she's a threat or not. And at the same time, the Glitchtale characters are trying to find a way back to their own world.
Ink!Sans is a popular pick. His creative and somewhat unpredictable nature can bring a lot of color (literally and figuratively) to a Glitchtale crossover. He could use his paint powers in the Glitchtale world in ways that no one expects. Also, Bete Noire from Glitchtale is a character that many fans like to include. Her relationship with other characters, especially her sister, can be explored in new and interesting ways when in a crossover situation.