The Pokemon Company has announced a serial code event for Pokemon Sword And Shield.
Starting March 27th, players living in Japan will have the opportunity to pick up a Pokemon Collection Guide from various Japanese retailers such as Tsutaya, Geo and more. Within this guide is a serial code to obtain special Dynamax Crystals, which in turn unlock raid battles for Stonjourner and Eiscue in Pokemon Sword And Shield.
— Serebii.net (@SerebiiNet) March 19, 2020
The code can be redeemed up until April 30th 2020, so be sure to use it quick if you get your hands on one.
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