Braixen's calm mind say "on turn start" but it only activates on the second turn, before the enemy attack, then the enemy moves and then it's my turn, it's really confusing. Not the best explanation but it's easy to test.
Also, I have a suggestion regarding shinies, cuz so far you can get a shiny from the mart but then after 15min and your run is over the shiny is gone, it feels more like an afterthought, almost as if it wouldn't make a difference if shinies weren't in, cuz you can only have it for basically a couple minutes depending on how much time you take on your run. My suggestion is that when you get a shiny, you unlock that shiny for that pokemon permanently, perhaps being able to choose if you want to display the shiny or the normal version of that pokemon.
I looked into the Calm Mind thing, the ability description was wrong sorry! the ability is meant to trigger after all pokémon have acted, I felt it helped differentiate it from other similar abilities (ancient power, dragon dance, bulk up). The disavantage from the less useful trigger point is offset with a bigger stat boost
that being said, I'm not sure if it is because of the wrong description, but if the way it works is so unintuitive I'm not opposed to changing it...