>>29137480Lemme go over gen 1 OU and why each pokemon is OU, that might paint a good picture of the tier.
For a briefer, to remind you, mechanics in gen 1 were very different. Crits were based on speed stat. Persian was OU for a long time SIMPLY because of always getting a crit Slash, and being able to run Bubblebeam. Wrap, and wrap-themed moves, were utterly broken. The biggest thing to remember besides crits is that Special is ONE STAT.
Anyway, Alakazam is Psychic, fast, and can tank with its ridiculous Special Defense, and can spread Twave. Chansey is a wall and had good Special Attack in gen 1. Cloyster had Clamp and Explosion, plus Blizzard has 90% accuracy in gen 1. Exeggutor was Psychic and Sleep Powder was one of the more accurate sleep inducing moves, plus had Explosion. Gengar has always been good, and having a normal immunity in gen 1 was invaluable, as well as having Hypnosis. Golem and Rhydon were good because Normal types were everywhere and they were immune to Electric, they accomplished similar roles. Jolteon was stupidly fast and had a super high crit rate because of it. Jynx was a fast sleeper and Lovely Kiss had okay accuracy, it also had good Special and Psychic was good this gen. Lapras was bulky enough to survive the tier. Slowbro had Amnesia, which raised SpAttack and SpDef so it was totally broken, plus it had Twave. Snorlax was bulky and tough, and if you KO'd a pokemon with Hyper Beam you ddn't have to recharge; it also commonly ran surf to deal with Golem and Rhydon. Starmie had varied moves, Recover, Twave, and was Psychic type. Tauros was fast enough for a good crit rate and had a good physical moveset with access to Hyper Beam, Body Slam, and Earthquake; Normal was actually one of the best types in RBY time because of Hyper Beam STAB and because there's pretty much no fighting types in OU. And finally, Zapdos is fast and strong and was one of the most successful mixed sweepers, but was kept in check by Rhydon and Golem.
