You will not receive any duplicates in your order meaning if you purchase the same number of Puca Surprise Mystery Pouches as the number of variations of a certain character, you will recieve one of each variation of that character in your order.
However, if you make a seperate order you may recieve duplicates. For example, if you order two Mystery Pouches and a few weeks later you decide to make another order, we cannot guarentee that you will recieve one of the charaters you do not already have.
You will recieve duplicates if you purchase more Mystery Pouches than there are variations of the specific character selection you are buying from.