To celebrate the release of the new XY expansion to the Pokémon Card Game on December 13, 2013, the Corocoro Presents XY's Super Hot Start-Up Campaign (コロコロプレゼンツ XY激アツ始動キャンペーン) will be distributing 4 special cards. For each 1000yen spent at participating stores that sell the Pokémon Card Game, players will receive 1 randomly sealed card pack featuring 1 of the 4 special campaign cards. Gablias, Dedenne, and Hitotsuki are the four special cards.
Source:
http://www.pokemon-card.com/campaign/xy1/