I haven't come across a Chinese novel that is clearly centered around the phrase 'you have guts'. Chinese novels cover a wide range of themes, from love and family to war and adventure. While courage is a common trait in many novels, there may not be one that is so simply named or themed as 'you have guts'.
Guts is purely fictional. It's a concept or character that exists within the realm of imagination and creative storytelling rather than being based on reality.
The 'bestiality scooby fanfic' is an extremely inappropriate and unethical concept that has a very negative impact on the Scooby - Doo fandom. It goes against moral and ethical standards and can make many fans feel disgusted. Such content has no place in a family - friendly and positive fandom like that of Scooby - Doo.
There are. You can find them on various fanfic platforms. However, the quality can vary. Some might be really well - written, with great character development for both Daphne and Scooby. Others could be more about the comical situations they get into. It really depends on what you're looking for in a fanfic.