From Bulbanews, your community Pokémon newspaper.
To be available at annual events
Codes to obtain Marshadow will be available at events to be held in the Netherlands and Belgium.
In the Netherlands, codes to obtain Marshadow will be available at the Nintendo Booth at the Firstlook Festival. The Firstlook Festival will be held at Jaarbeurs in Utrecht, Netherlands from October 7 to 8, 2017.
These codes are for the same Marshadow announced last month. Marshadow will be level 50 and know the moves Spectral Thief, Close Combat, Force Palm and Shadow Ball. The announcement states that it will hold a Marshadium Z, but Marshadow is more likely to be bundled with the Marshadium Z, as is done with other event-exclusive Z-Crystals, since Z-Crystals that appear in the Bag to create held Z-Crystals cannot themselves be held.
Marshadow codes will also be available at participating retailers in parts of Europe from October 1 to November 16, 2017, and in North and Latin America from October 9 to 23, 2017. This means that Belgium will be the first country to get codes for this Marshadow (Marshadow has previously been distributed in Japan).