Chansey

As one of the bulkiest Pokemon in the game, Chansey is the premier special wall of STABmons, being able to check or counter most special attackers thanks to its massive special bulk alongside Eviolite. Its Defense isn't too bad either, allowing Chansey to wall its fair share of physical attackers. Both of these traits are also augmented by a fairly decent typing that, while giving Chansey only one immunity and no resistances, also gives it but a single weakness to Fighting, and the few Fighting-type special attacks available mean that special attackers will rarely have any super effective moves to use against Chansey. In addition, thanks to its titanic HP stat and access to Eviolite, Chansey is the only Pokemon in the metagame that can make use of Transform. However, Chansey is prone to being worn down given that it lacks Leftovers and is very reliant on its Eviolite, so it despises both Knock Off and Trick. In addition, the pink blob has a hard time taking on Psychic-types effectively, as Psystrike targets Chansey's weaker Defense stat, and it must rely on support moves and Seismic Toss in order to pose any direct threat to the opponent's team due to its abysmal attacking stats. Such reliance on support moves also makes it weak to Taunt, especially from Ghost-types and Pokemon with 101 HP Substitutes. Finally, while Chansey has many move choices in its arsenal, it may have trouble deciding on four of them.