Tapu Fini

Tapu Fini's Water / Fairy typing allows it to be one of the best Mega Charizard X answers, as well as letting it take on other common Fire- and Dragon-types like Air Balloon Heatran and bulky Zygarde. Its great bulk lets it take attacks from the likes of Landorus-T and Golem, while the ability Misty Terrain allows it to take on common sleep users like Vivillon and Jumpluff. Tapunium Z along with Taunt also helps it shut down common stall Pokemon like Chansey and Necrozma. Waterium Z allows Tapu Fini to take care of non-specially defensive Mega Mawile along with other offensive Pokemon like Landorus-T, as well as Mega Charizard Y through Z-Rain Dance. However, Tapu Fini struggles with Pokemon like Mega Metagross, Ferrothorn, Mega Venusaur, Magnezone, Togekiss, and Zeraora because of their bulk or their super effective attacks. Furthermore, the Waterium Z set also has trouble with dealing with special walls like Chansey, Meloetta, and Mega Slowbro, which can wear it down slowly with their attacks.