New features are coming to the PokéMileage Club via the Pokémon Global Link website:
Be sure to visit the PokéMileage Club on January 14th! First, play the Balloon Popping attraction to earn items—including some that are useful for Pokémon Evolution in Pokémon X and Pokémon Y. The more Medals you have, the more levels in the game you will unlock. Play Balloon Popping by spending the Poké Miles you’ve earned throughout your adventure in Kalos.
Then head to the PokéMileage Club to claim your Discount Coupon, an in-game item that will help you afford some of those pricey clothes you’ve seen in the many boutiques around the Kalos region. The Discount Coupon is usable only once and will give you 50% off the cost of any one transaction in a store, so choose what to spend it on wisely. Note that you can purchase multiple items in one transaction by choosing what to buy inside a fitting room. The Discount Coupon isn’t available via normal gameplay, and you have only until 2:59 p.m. EST / 7:59 p.m. GMT March 3rd, 2014, to visit the PokéMileage Club and receive the coupon, so don’t wait!
Also on January 14th, Pokémon Global Link will close permanently for those using it with Pokémon Black, White, Black Version 2 or White Version 2.