Pixie Hat

Pixie Hat is an item introduced in Pokémon XY Naturia, but added to Generation Omega. When held by a Pokémon, its Fairy moves gain 30% extra power. It is given to the player by Riley after they give her the R.E.M. Autographs they received from Melissa after defeating her.

This is one of two concepts from XY Naturia, Litmus being the other.