Olympia, along with her Meowstic, came to Laverre City with Valerie and Grant. When Valerie started to question Trevor whether the Laverre City's tree looks grander than Xerneas tree, Olympia had Meowstic pull Valerie, for they had to be going.
Olympia and Meowstic, along with other Gym Leaders, were fighting Team Flare forces, stationed at other cities. Clemont recalled how the Pokémon, including Meowstic, surrounded Delphox, but Shauna's Tri-P would't leave it alone.
None of Meowstic's moves are known.