Talk:FAQ/@comment-24.222.3.125-20150818135414/@comment-26005122-20150818191140

Once they max out, you'll no longer receive that particular Tsum from the boxes. On the Japanese version, occasionally, they have a gacha event where you'll be guaranteed a certain Tsum from a handful of different ones. If you get one where the Tsum is at max skill, you'll get a Premium Ticket instead.