【How-to】How do you get gengar gigantamax

To do this, simply interact with an inactive Den to collect your Watts, and then interact with the Den a second time. You’ll be asked if you want to throw a Wishing Piece into the Den. Select “Yes” to use the Wishing Piece and a Pokemon will appear in the Den. It will have the chance to be a Gigantamax Gengar.