Terrakion, and Virizion. After learning the move Secret Sword, Keldeo changes to its Resolute Form, which is purely cosmetic. As for Meltan, the Hex Nut Pokemon first appeared in Pokemon GO ...

Persian will always come up first and is weak against Fighting, so having a Mega Lucario with Force Palm and Aura Sphere, or Terrakion with Double Kick and Sacred Sword are your best bets here.