Little Fungitown Item Shop
From the Super Mario Wiki
The Little Fungitown Item Shop is a location in Mario & Luigi: Superstar Saga. It is found near the entrance to Little Fungitown and sells a selection of consumable items. Its prices vary with the player's discounts, such as the one that the Stache stat applies. It is open as soon as Mario and Luigi enter the town, though due to its remote location and when it first appears, its stock is updated less than the Castle Town Item Shop in Beanbean Castle Town.