Porygon

Porygon is a small fish in a big pond. Its stats are typical of an unevolved Pokemon, making it much slower and weaker than just about everything. Despite this issue, Porygon's access to Recover and immunity to paralysis from Body Slam give it just enough to be a surprisingly viable pick in OU. These two traits make Porygon an impeccable switch-in to one of the most important Pokemon in OU, Snorlax. Porygon has just enough Speed and physical bulk to switch in against Snorlax and stall out its 24 Body Slam PP with its 32 Recover PP. Most variants of Snorlax will struggle to make any progress against Porygon, meaning Porygon can consistently force it to switch out, as it is almost never worth using Snorlax's Self-Destruct against such a low-value Pokemon. Porygon should always be used with Chansey to create a defensive core; Chansey can handle special attackers like Alakazam and Starmie, while Porygon can handle Snorlax and paralyzed physical attackers.

While its matchup against Snorlax is its main selling point, Porygon can wall some other Pokemon in a pinch. Pokemon that are unable to reliably status Porygon will usually struggle to defeat it in a head-to-head matchup. Especially if they are paralyzed, Porygon is relatively comfortable against Tauros and Gengar, for example. However, Porygon has some consistency issues in even its best matchups. Critical hits and strong attacks can expose its poor defensive stats, Ice Beam and Blizzard can freeze it, Special drops from Psychic can overwhelm it, and paralysis can render it unable to wall Snorlax securely. Perhaps worst of all, Porygon can be easily overpowered by Amnesia Snorlax, meaning it will have almost nothing to do against teams with that set.