After having little success using the Z-Move Hydro Vortex, Lana and Popplio meet Ida and her Brionne, who use the Z-Move as part of their show and agree to take Lana on as an apprentice! Lana and Popplio train hard—and when Ida’s sweetheart Kanoa ret... (more)urns with reports of sunken treasure, they join the expedition.