Z-Moves proved to be challenging to implement in Pokemon Sun and Moon

Every single Pokemon in Pokemon Sun and Moon is capable of using Z-Moves during battles. Implementing this new element proved to be challenging for developer Game Freak, according to producer Junichi Masuda. “Each and every Pokemon are capable of using Z-Moves, so we had to create new animations for all of them as well,” Masuda said in an interview with Famitsu. “We also had to make sure the Z-Ring glowed properly when you used them in-game. I expected it would be difficult, and it certainly was (laughs).”

Z-Moves are powerful moves that can only be used once during battle. The explosive force of a Z-Move is the result of both the Trainer and Pokémon releasing their full power together when their wishes resonate with each other. All Pokémon are capable of using Z-Moves in battle. To use Z-Moves, two key items are required: a Z-Ring and a Z-Crystal. The Z-Ring fits on a Trainer’s arm, and Z-Crystals are set into it. If a Pokémon holds the same variety of Z-Crystal as its Trainer, the two will be able to resonate with one another.

Source: Nintendo Everything