Professor Kukui and Ash in “Trial and Tribulation!”

When you use a Z-move, both you and your Pokemon expend a large amount of energy. So in a way, you Pikachu and Rowlet are now, your Z-move should be quite a bit tiring.

The important thing is when I use it. Is that right? [In other words, time the Z-move correctly or prepare to lose the match]

Exactly, Ash. We are ready to go, Hala!