Chansey

Chansey has a solid, albeit limited, niche in DOU as one of the best stops to the tier's powerful special attackers like Naganadel, Heatran, and Landorus thanks to its absurdly high HP and decent Special Defense. Chansey can apply offensive pressure with Seismic Toss and Toxic while also acting as a late-game wincon if all opposing physical attackers are taken care of. Chansey's Defense does leave a lot to be desired even with Eviolite, however, leaving it extremely vulnerable to physical attackers like Urshifu-R and Incineroar. The former of whom threatens to OHKO Chansey, while the latter can remove its Eviolite with Knock Off. Chansey is also very passive due to its low initial damage, allowing the special attackers it's supposed to check to attack Chansey's teammates without much fear of Chansey itself. Incineroar is a great partner for Chansey, as its Intimidate helps patch up Chansey's Defense. Landorus is an offensive partner that appreciates Chansey switching in on Naganadel and Dragapult, which normally threaten to OHKO it, while also beating Urshifu-R.