Blind Box refers to the type of packaging that keeps the collectible toy as a mystery until it is opened. Blind boxes typically come in series that shows a collection; some figurines are rarer to find than others, these are referred to as "secret", "hidden" or "chase" figures.
A whole box contains no-repeated figures. If there is a secret figure in the box, one basic figure will be randomly replaced by it.
This series consists of 10 designs in total, including 8 regular designs and 2 hidden design. The probability of obtaining a regular design is approximately 12.16%, while the probability of obtaining the hidden design is about 2.7%. This means that for every 72 items, one hidden design will randomly replace one regular design.