>>26902040gadget gym
each turn you or the gym leader can select a gadget to use instead of a move
their effects range from inducing some weather or terrain effect, to arena trap, healing bell and the like. Maybe even full ps/status heal effect for all pokèmon on the field, which would make for some interesting tactics imho
a variation on this theme would be a gambling gym where a roulette decides the effect each turn, randomly
