Magearna

Magearna offers a fantastic answer to Xerneas, Arceus-Dark, Yveltal, Deoxys-A, and Mega Mewtwo Y variants lacking Fire Blast that can also provide the team with momentum. It has support moves such as Heal Bell and Heart Swap at its disposal, which help it thrive in the Anything Goes metagame; the latter specifically makes Magearna a reliable Geomancy Xerneas and Calm Mind Arceus-Dark answer. Furthermore, Magearna's great defensive typing allows it to check Flying-types like Yveltal, Vivillon, and Arceus-Flying as well as Rock-types such as Tyranitar and Arceus-Rock. However, even with such valuable defensive utility, Magearna has a disadvantageous matchup against some important offensive threats in the tier such as Primal Groudon, Arceus-Ground, and Ho-Oh, the former two of which also stop it from using Volt Switch freely. Other Steel-types in the tier such as Necrozma-DM and Arceus-Steel compete with Magearna by offering different utility like Stealth Rock and reliable recovery. They can also use Magearna as setup fodder because of how weak it is. Since Magearna is forced to maximize its bulk, it sacrifices most of its offensive presence, making it a very passive Pokemon to have on a team.