Chansey

Ever since GSC, Chansey has been outclassed by its evolution, Blissey. Things have changed in BW, however; with an Eviolite equipped, Chansey is actually much bulkier than its evolution, with its defensive stats rise to monstrous levels. Unlike Blissey, Chansey can take non-super effective physical hits with relative ease, something Blissey can not boast to do. Unfortunately, it's not all good news for Chansey. Although Eviolite boosts Chansey's defenses, its Defense stat is still rather low. Finally, Chansey falls to every commonly seen Fighting-type in the DW tier, most notably Breloom and Conkeldurr. Without Toxic Spikes support, Substiute + Calm Mind Chandelure can easily set up all over Chansey and proceed to destroy the blob and its teammates. Don't let these weaknesses deter you from using Chansey, though, as it can prove to be an excellent member of your team.