Poké Mart

From the Pokémon Wiki, a database for the Pokémon series that anyone can contribute to

A Poké Mart is where you can buy items for your Pokémon. It has people to talk to who can give you hints on some of the items. This is also where you go to get the special item if you use a cheat code to get one of the Legendary Pokémon. This building is found in just about every town and city in the games. It represents all the shopping centres and markets one would find in a city.