Someone posted a page out of the Pokemon X and Y guidebook that explained Pokemiles. It said you can trade your Pokemiles for prizes at the Pokecenter in Lumiose S.Blvd including a discount coupon allowing 50% off clothing stores in Kalos. However, it's not in the list of available prizes. Googling yields no useful results except something about medals to increase the selection. What are these medals? Has anybody managed to obtain the coupon?

I don't have the image saved, so if somebody wants to post it that would be great.