S Rank
Reserved for Pokemon that are absolutely meta-defining. These Pokemon are able to perform a variety of roles very effectively, or can just do one extremely well. Their use has low risk involved and high reward exerted. Pokemon in this rank have very few flaws that are patched up by numerous positive traits.
S
Piloswine [Eviolite, Choice Band, Icium Z]: has super effective stabs against rhydon. risky to setup with sd.
A Rank
Reserved for Pokémon that perform extremely well in the metagame. These Pokémon are typically considered excellent Pokémon let down by a few faults, thus keeping them out of S Rank. They typically require more support than an S Rank Pokémon, but nonetheless are very effective.
A+
Electabuzz [Fightium Z, Eviolite, No Item] fightium z focus blast, or simply focus blast
Golbat [Eviolite] -
Gurdurr [Eviolite, Flame Orb] BU+Drain Punch
Misdreavus [Eviolite] wins cuz levitate+shadow ball / WispHex / whatever
Qwilfish-Hisui [Eviolite, Darkium Z, Poisonium Z, Waterium Z] (z)waterfall
Wartortle [Eviolite] lol
A
Frogadier [Eviolite, Focus Sash, Waterium Z, Heavy Duty Boots] lol
Raboot [Choice Band, Fightium Z, Firium Z, Heavy Duty Boots] HJK go brrr
Rhydon [Eviolite, Choice Scarf]
Servine [Eviolite] lol
Thwackey [Eviolite, Grassy Seed] lol
A-
Corsola-Galar [Eviolite] whirlpool, strength sap
Duosion [Eviolite] fsight or whatever move
Sliggoo-Hisui [Eviolite, Steelium Z, Life Orb] (z)flash cannon
Hattrem [Eviolite] psychic / giga drain
Machoke [Eviolite, Icium Z, Flame Orb] dynamic punch / cc etc. lol
Magmar [Fightium Z, Firium Z, Sitrus Berry, Eviolite, Heavy Duty Boots, No Item] (z)focusblast
Mareanie [Eviolite] cant switch in
Roselia [Eviolite] lol
Tinkatuff [Eviolite] encore, cant set up
Tangela [Eviolite] LOL
Vigoroth [Eviolite] taunt bu
B Rank
B Rank Pokémon are typically considered good, but overall quite niche, and require much more support than a Pokémon in A or S Rank. Their flaws are also much more prominent than Pokémon in S or A Rank, making them less effective overall
B+
Clefairy [Eviolite] -
Crocalor [Eviolite] wisp, risky switch in
Dunsparce [Eviolite] earth power
Fraxure [Eviolite, Steelium Z, Choice Band] low kick / iron head
Gabite [Eviolite] eq
Klang [Eviolite] magnet rise ggrind
Lampent [Choice Scarf] energy balls
Marshtomp [Eviolite] scald
Monferno [Electrium Z] cc
Naclstack [Eviolite] bad
Pawniard [Eviolite, Steelium Z] iron head, cant switch in
Rufflet [Choice Band] cc
Vulpix [Heat Rock] energy balls
B
Combusken [Eviolite, Firium Z] cc
Dartrix [Eviolite] lol
Drakloak [Eviolite] ???
Girafarig [Eviolite] special attacker
Glimmet [Eviolite, Focus Sash] ep sash debris. lol
Hakammo-o [Eviolite, Steelium Z, Dragonium Z] FIGHT
Ivysaur [Eviolite] lol
Morgrem [Light Clay] ???
Quilladin [Eviolite] LOL
Swirlix [Grassy Seed] get surf'd
B-
Ferroseed [Eviolite, Focus Sash] lol
Fletchinder [Eviolite] wisp...???
Krokorok [Choice Scarf] eq
Magnemite [Eviolite] get beam'd
Metang [Eviolite] um
Murkrow [Eviolite, Choice Scarf] um
Palpitoad [Eviolite] whys this ranked
Quaxwell [Eviolite] lol
Sliggoo [Eviolite] can fit coverage
Toedscool [Eviolite] lol
Zweilous [Choice Band, Eviolite, Darkium Z] uh
C Rank
C Rank Pokémon are generally mediocre in the metagame. They typically require much more support than Pokémon higher up the viability rankings, although they can still be effective in the right circumstances.
C
Gastly [Choice Scarf] eball
Lairon [Eviolite] ?
Mienfoo [Choice Scarf] hjk or w/e
Seadra [Eviolite, Life Orb] lol
Vullaby [Eviolite] ok