Pokemon Center 2018 Pokedolls Campaign Mew & Poliwhirl small size drawstring dice bag. It was sold at the Pokemon Centers in Japan, in May, 2018, for a very limited time and in very limited quantity, during the Pokedolls campaign. It has a drawstring so you can close the bag. You can use the bag for dice, game accessories, makeup, coins, cards, or just about anything. Made of 100% cotton.