10 Aegislash
Because of its unusual Stance Change ability to become suddenly more protective or aggressive, this Pokémon was exceptionally hard to deal with, and simply needed a little less numerical power.
Did they nerf Aegislash?
Aegislash is the only Pokemon to get nerfed (compared to gen 7, not Let's Go). Its SpA and SpD in its sword form is now 140 instead of 150, and its Def and SpD in Shield form are now 140 instead of 150.
Why is Aegislash not uber anymore?
On Pokemon Showdown, every person to qualify for the reqs (usually good ladderers) was given the power to vote for its ban. It ended up in Aegislash's disadvantage so it got booted out of the OU tier, but not out of competitive play as it can still be used in Ubers.
