The Pokemon Company has finally revealed details for the Shiny Silvally Distribution in North America and the United Kingdom.
In North America, code cards for Shiny Silvally will be distributed at participating GameStop and EB Games outlets in the US and Canada respectively. Distribution begins on October 23 and ends on November 13, 2017.
In UK, trainers can pick up a code card for Shiny Silvally at participating GAME outlets from November 3 to November 16, 2017.
Also, kindly note that Shiny Silvally is only redeemable on Pokemon Sun and Pokemon Moon.