Wishforge

The Wishforge is a location under the Nearby Places section. Here, one can create Gemwish Badges that increase the EXP received by interactions. There are 18 Badge types (one for each Pokémon type) and reach up several tiers (The quantity of which is currently unknown). They can be created and upgraded with Gems of their associated type and their construction completed by evolving Pokémon of the same type.

You can only access the Wishforge after having bought the Badge Case from the Shop.