I read a spn story a long time ago (and there were several others that I didn’t read). I’ve also encountered some other weird fandom stories that I’ve featured on this blog. From what I can remember, there were two riverdale stories (pregnant by cole sprouse (gone but not forgotten😭) and there was one where someone just made an episode version of the riverdale cast singing mad world), full house, hsm, stephen king’s carrie weirdly enough, an icarly/drake&josh horror crossover (icrazy), the outsiders (the se hinton book you probably read in middle school, also a movie), the one where waluigi (the video game character) goes to relationship counseling (bad boyfriend ft waluigi (rip😭))... also the earl and i (which i just wrote a rec for) was low key probably inspired by jane eyre.
There are also some fandom stories I’ve encountered that weren’t featured on my blog. I.e: five nights at freddy’s (the game), a fortnite story (which was actually written by the same author as the five nights at freddy’s story), austentatious (the jane austen/dirty dancing story that is low key good), tvd and twilight have inspired A BUNCH of stories (in some cases directly like with nova and in other cases indirectly like with slave to the vampire). Actually those and spn have heavily influenced the fantasy genre on Episode. Something I learned about Episode is that if there is a fandom for it, you will find a story about it on the app.