Each pack of 4 comes with a Bitty Pop! mysterious rare or hyper-rare to complete the series. The Bitty Pops! They come in hard acrylic cases with detachable bottom covers. The removable bottom covers serve as an acrylic base, to which the Bitty Pop figures attach! Your Pops! favorites have become Bitty Pops! Expand your collection with this assortment of Bitty Pop! of your most beloved cartoon characters.