Chansey

Chansey's unrivaled special bulk and exceptional movepool make it a staple of Stadium OU and mandatory on most teams. Its ability to paralyze foes, heal itself, and steadily chip away at the foe's HP throughout a match grant it an outstanding defensive presence. Chansey can even set up Reflect to increase its physical bulk and take on strong physical attackers like Snorlax. Despite it lacking a Psychic-type resistance, its sheer bulk is more than enough to let it switch into the tier's various Psychic users and force them to waste valuable PP. Another benefit of Chansey's titanic special bulk is that it can serve as an excellent paralysis absorber, making further status attempts much more difficult. It's also a potential user of Stadium's buffed Substitute against paralyzed foes, as no unboosted special move can break its Substitute in one hit.

Chansey's main weakness is its pitiful Defense stat, which leaves it easily overwhelmed by common physical attackers like Tauros, Snorlax, and Rhydon. This is compounded by its rather lackluster offensive presence despite its amazing movepool and high Special; without the right attacking move, like Ice Beam for Rhydon and Seismic Toss for Alakazam, it has the tendency to just sit there and eventually fall to critical hits, Special drops, or running out of Soft-Boiled PP. Chansey's Speed leaves it outsped by the majority of the tier, forcing it to usually take two hits when switching in. Despite it being an excellent paralysis absorber, a paralyzed Chansey is very susceptible to losing to RNG, as Alakazam and Starmie have decent odds of eventually breaking through Chansey with Psychic. Stadium's mechanic changes are a double-edged sword for Chansey; the nerf to Hyper Beam means Chansey is significantly less threatened by many physical attackers, especially Tauros. However, Rest and Substitute being more common means that Chansey is more susceptible to being walled or stalled out. The changes to critical hit rates makes some foes like Tauros weaker against Chansey, while others like Snorlax and Rhydon have a much higher likelihood of getting lucky against it.