Some characters might be amused. For example, Sans would probably make some witty remarks about the fanfiction's plot twists. Papyrus, on the other hand, might be a bit confused at first but then get really excited if he finds a heroic role for himself in the fanfiction.
One popular 'Undertale Bad Time Trio fanfiction' is 'The Trio's Adventure'. It delves into the unique relationships between the characters in the Bad Time Trio. They go on various escapades, facing challenges and enemies together. The story is filled with action and some really interesting character development moments.
Adventure is also a big theme. Since they are such dynamic characters, they are often put into exciting adventures, exploring new areas in the Undertale world, fighting off monsters or solving mysteries.
The founders might be quite surprised by the Golden Trio. They could be impressed with their skills and knowledge. For instance, Hermione's vast magical knowledge would surely catch their attention.
Charlie Brown has his own unique qualities and strengths within the comic. Comparing strength can be complex as it could refer to physical, mental, or emotional aspects. Generally, it's not a straightforward comparison.
It depends on how the author of the fanfiction has developed the plot and the characters. They could have given Natsu some special power - up or a unique situation that makes him stronger than Gildarts. For example, the author might have introduced a new form for Natsu that gives him an edge in combat, or perhaps they've weakened Gildarts in some way for the sake of the story. However, in the original series, Gildarts is extremely powerful, so this is a significant departure in the fanfiction.
The following are some recommendations for novels where the main character is stronger than the system:
1. The Self-Cultivation of the Male Lead. Author: Wen Ruo Bucheng
2. I'm the Common Villain in the Fictions, by Big Firepower and Small Gun
3. The Number One Strong Control in History. Author: Old Xu
4. Low-Dimensional Revolution, by Fat...
Please note that these novels may only partially meet your needs. You are recommended to search further for more relevant novel recommendations.