Can anyone give me some recommendations for stories on here that involve fighting tournaments, underground or otherwise?

https://www.fimfiction.net/story/16623/mobile-fighter-g-pony

7407798
The story sounds good, but it's not what I'm looking for. I'm looking for more the kind of thing you'd find here or in Street Fighter. So... Do you have any ideas?

7410374
One of these groups might have the stories that you seek.