Like if a poke uses sword dance, having the 2x attack indicator, or when you use growl, showing the enemy has .75 defense or whatever it goes down to
I have never coded a game, but I have coded on my own before, and I have an idea of how it could work if you want to try it with me?
I'm thinking that it would be a simple fix (as in not too many new things, not in ease of doing it), essentially just boxes for stat changes to show, and calls to change the numbers there whenever a stat change is made.