Blissey

Blissey returns for yet another round in the Uber tier as the premier special wall. No Pokemon does Blissey's job better, with the possible exception of her sister Chansey. Few special attackers can break through Blissey thanks to her titanic Special Defense and HP stats. Almost any team, particularly stall teams, will appreciate Blissey's ability to sponge assaults. While Chansey gives stiff competition with better bulk, Blissey's consistent passive recovery allows her to switch in and out of battle without using Wish or Soft-Boiled as often. Thanks to Leftovers recovery, Blissey can take weaker hits such as Dialga's Dragon Pulse better than Chansey can. As a bonus, Blissey can even surprise opponents with her underwhelming but workable Special Attack.