The small ball pop-up store

Quick answer：

The 'small ball pop-up store' refers to a temporary retail space that is typically small in size and focused on selling unique or limited-edition items. These stores are often themed around a particular product, brand, or character, like the cartoon character 'Crayon Shin-chan's' 'small ball' in this case. Pop-up stores are a popular marketing strategy used to create buzz, engage customers, and test new markets.