Do Pokémon Sun and Moon finally prove a weird fan theory? Marshadow event details - participating stores and Marshadow code giveaway dates We're still awaiting a little more info on the specifics, but here on this page is where you'll find everything we currently know on how to get Marshadow via Marshadow download code, and where and when the Marshadow even starts and ends. Marshadow event details have finally emerged, nearly a year after the Pokémon Sun and Moon games were originally released.