>>46624202Active Time Battle is an old RPG way to take turns, initially from FFIV. It uses Speed-based gauges that, once theirs is full, a character can act after. Some moves may need an extra gauge filling to work.
Such a thing in Pokémon would greatly emphasize Speed, as that means more actions and maybe getting two in a row against slower mons. Things like Snorlax would fall a tier or two really quick.