Board Thread:Help and Questions/@comment-36275395-20180721134621/@comment-26005122-20180722210041

They're probably not being offered at this time yet. They only offer select Tsums and they rotate them out every other week or so. You can check which Tsums are currently available in the Premium Boxes by tapping the List Button on the screen that asks to Confirm Purchase when you're about to buy a Premium Box.