The online Pokemon Center store has opened in the US! It currently features a limited selection of apparel, accessories, home decor, and games! The site is here: http://www.pokemoncenter.com/ Spoiler As a bonus, the new Pokeball Pattern Vivillon can now be gotten through Wi-Fi connection on your 3DS! Info on that can be found here: http://www.pokemon.com/us/pokemon-news/poke-ball-pattern-vivillon-takes-flight/
Well, there's one in Japan and I believe France also. They just reopened the US one since it closed a while back.