A new element to Pokemon battle has been introduced as Z-Moves. A Z-Move is a powerful move that can only be used once during battle. Trainer and Pokemon can release their full power together, but only when their wishes resonate with each other. Every Pokemon will have a Z-Move.
In order to activate the Z-Move, your trainer must have: A Z-Ring and a Z-Crystal. The Z-Ring is worn on the trainers arm and Z-Crystals are set into it. If the Pokemon has the same crystals as the trainer, trainer and Pokemon will “resonate”
Speaking of Z-Ring, participating retailers will have an actual Z-Ring for sale. When you use a Z-Move in Pokemon Sun/Moon the Z-Ring lights up, vibrates, and plays sounds along with the game!