Celesteela is one of the best Pokemon in the tier, with a fantastic defensive typing, well-rounded stats, and a large movepool. Steel / Flying typing along with massive bulk allows Celesteela to check many threats in the tier such as Tapu Lele, Mega Diancie, Mega Alakazam, Latios, Garchomp, Tapu Bulu, and Landorus-T. Even though Celesteela lacks reliable recovery, access to Leech Seed allows it to sustain itself against non-Grass-types. Celesteela also has the option of offensive sets that can snowball with Beast Boost, but those lack Speed and can be easily outsped by fast Choice Scarf users even after an Autotomize boost. Despite being a fantastic Pokemon in OU, Celesteela struggles with the high usage of Zapdos, which shuts down all sets and PP stalls Leech Seed easily. On top of this, many Pokemon Celesteela is supposed to beat are constantly adapting to its presence and running Z-Moves in order to remove it or drastically weaken it, with examples being Fightinium Z on Tapu Lele.