Mike chuckled to himself as he heard them all talking about what ones of their Pokemon would benefit from Wateriun Z before e said "You know something else, I heard there's a tournament at the battle royally where people can earn some very special Z crystals though I gained each of mine by exploration of all 4 island. Once we're finished at the water trial, you'll be eligible to enter but be warned, you probably be fighting trainer that have more Z crystal then you which means there Z moves will be a lot stronger"