The Happy Haberdasher is a magical being believed to be able to travel time and space, and who is also believed to have access to other dimensions. The Haberdasher will at times visit YoWorld to sell some of the hats it collects on his journey. Normally, the hats coincide with the current theme. Typically, he sells them in mystery boxes.
He even has his own holiday, which was first celebrated on July 3, 2015. On the Happy Haberdasher's first trip back to YoWorld, he brought with him a collection of hats to sell to YoWorlders. Many of which could be found within a special mystery box, which costed 9 YoCash. The Haberdasher appears on multiple other occasions as well through the year.