Pokemon Center 2018 It's Mimikyu Campaign Mimikyu & Pikachu collector tin with choco sandwich cookies. This limited edition collector tin was only sold at the Pokemon Centers in Japan, in February, 2018, for a very limited time and in very limited quantity during the It's Mimikyu campaign. The top of the cookie tin opens and there are 15 choco sandwich cookies inside. Once you eat the cookies, you can use the tin as a storage container. Made of metal.