The Z-Move (Ｚワザ, Z Waza) is a gameplay mechanic introduced in Generation VII. Z-Moves are very strong and powerful attacks that certain Pokemon can gain access to. However, Z-Moves are used only once for each battle. Z-Moves can be activated with a special item called a Z-Crystal and a Z-Ring.
List of Z-moves
According to the recent trailers, there are so far only eight Z-Moves.
An Electric-type Z-Move. It allows the user to unleash an arrow-shaped electric blast.
A Grass-type Z-Move. The animation for this Z-Moves depicts the user unleashing a powerful vortex of flower petals.
A Fire-type Z-Move. The user unleashes a fireball that grows in size the further it travels.
A Water-type Z-Move. The Pokémon fires a blast of water, which transforms into a powerful water tornado.
A Fighting-type Z-Move. The user pummels the target with fury
A Ghost-type Z-Move. It is unknown exactly what it does.