>>46067178You can communicate with your pokemon to give them a direct instruction (dodge, make sure this lands, hit extra hard etc.) through a special device that comes in the form of an anklet.
Because the signals have to travel through the ground to reach your pokemon, you have to be barefoot while using it.
So all pokemon battles and traveling is done barefoot or near-barefoot (wearing stirrup stockings or toeless socks) and society adopts it as standard dress, with full footwear being considered the equivalent of wearing oven mits all the time.