Z-Crystals

A Z-Crystal (Japanese: Ｚクリスタル Z-Crystal) is an item required to upgrade moves to Z-Moves. During the game, the player can obtain Z-Crystals for their Bag, which will be stored in a dedicated Bag section. These Z-Crystals can be used to create held items of the same name at will. A held Z-Crystal is automatically removed if the Pokémon is traded between players; however, some Pokémon received from in-game trades may be holding a Z-Crystal the player already has.