Don Quijote is a Japanese store chain which is known for selling a variety of products and being open on late hours. Sort of like a convenience store but with more stuff to buy. As with many stores, it has a mascot: a cute little blue penguin called DonPen. I founded out about them through a post saying the store changed its plans to replace him as their mascot, which is where I realized that the Delibird Presents store is directly based off of Don Quijote.