Game Freak lets you create a new stat for the next gen games. what do you add?
Luck. Increase crit chance, increases evasion. It's a static stat, being the same across the species. It's higher with shitty Pokemon. Impossible to raise outside of Lucky Egg and Lucky Punch, raising luck by 10 and 15 respectively. Luck is capped at 100.
Dunsparce face when it becomes top tier and smogon tries to ban it
Some kind of affection stat would make sense, kind of like some of the perks they added with Pokemon-Amie. It would be cool if the stat had both positive and negative effects depending on whether or not your pokemon loved you or hated you. And then maybe frustration might actually be a viable move too.