One common theme is redemption. Ketch has done some not - so - great things in the show, and in fanfiction, he often gets a chance to redeem himself. For example, he might help the Winchesters in a big way to make up for his past actions.
One plot idea could be Ketch getting involved in a time - travel adventure within the Supernatural universe. He could go back in time and interact with the Winchester brothers at different points in their lives, changing the course of events in unexpected ways.
You can try websites like Archive of Our Own (AO3). It has a vast collection of fanfictions including those related to Supernatural. Just search for 'Supernatural' in the search bar and then look for stories that might mention 'ketch' in the summary or tags.
One popular Arthur Ketch and Dean fanfic is 'The Unlikely Alliance'. It delves into their complex relationship as they are forced to work together on a hunt. Another great one could be 'Ketch's Redemption', which shows Ketch's journey towards redemption in Dean's eyes. And there's also 'Dean and Ketch: A New Understanding' that focuses on how they gradually come to respect each other.
The fact that Arthur Ketch and Dean are from different backgrounds within the same universe is a big draw. Ketch has his own set of values and methods that are often in contrast to Dean's. Fanfics allow us to explore how these differences play out. Additionally, the chemistry between them, whether it's a tense, confrontational chemistry or a more collaborative one as the story progresses, is exciting to read. There's also the idea of redemption in some of the fanfics. If Ketch has done wrong in the past, seeing how Dean might be involved in his journey towards redemption or how they both grow from their past mistakes is really appealing to readers.
Another option is to join Supernatural fan groups on social media platforms like Facebook or Reddit. Fans often share their favorite fanfictions in these groups. You can ask specifically for Ketch fanfictions, and someone might be able to point you in the right direction.
Smut fiction is a type of fictional writing that contains sexually explicit content. It often focuses on sexual encounters, relationships, and desires. However, it is considered a form of adult - oriented literature and may not be suitable for all audiences.