>>38397948From this month's Corocoro anime preview:
>CHECK No. 4: SUIREN>This proactive Pokémon battler and her Osyamari are a perfect team! Will she make big waves from the Alolan sea and win her way through the tournament?>SHORE (SUIREN'S EIEVUI): Shore is extremely curious and mischievous. Will it be an active battler as well?>OSYAMARI: Osyamari and Suiren have gradually grown stronger together. Will it evolve again?!>SOMETHING HAPPENS TO OSYAMARI IN THE EPISODE THAT AIRS MAY 5TH?! (airdate and time may vary depending on region)>Z-MOVES SUIREN CAN USE:>SUPER AQUA TORNADO: Osyamari has been able to use this Z-Move ever since it was an Ashimari!If that's not enough proof, the kicker is every Z-Move shown off in the anime so far has also had its name flash up on-screen in fancy text, except Oceanic Operetta (hell, even Kakai's Charizard got the text flash-up when it used Supersonic Skystrike). This actually happened twice, Ida used Hydro Vortex for her performance in her and her Brionne's debut episode and didn't get the text flash, but it did flash up for Popplio later in the episode when she mastered it. Given that it's highly unlikely Ida will return for the League (and thus use Oceanic Operetta in-battle), the most obvious candidate to use it must be Lana's Primarina, especially as we know she also has a Primarium-Z already.