In the past 48 hours I have captured 3 shiny slugmas, a shiny fraxure, a shiny growlithe, a shiny charmeleon, and then a shiny Braixen...all this within the past 48 hours. And they weren't even found with the fishing method, pokeradar or the masuda method either. I feel like the more shinies I encounter, the higher chance I have of finding more, I don't know if anyone else feels that way too.