Artwork by @JoyFrost SM OU Viability Rankings Hello and welcome to the SM OU Viability Rankings. In this thread, we as a community will rank every single usable Pokemon into tiers that reflect their viability in the current OU metagame. Everyone is encouraged to post their thoughts and opinions on the rankings provided they are justified by solid reasoning. Poorly made posts will be deleted and multiple occurrences might lead to an infraction. This thread is for discussing the viability of a pokemon in OU, and the discussion should be strictly about that. To discuss possible suspects and the metagame in general, please check out the SM OU Metagame Discussion Thread right here. S Rank: S Rank is reserved for Pokemon who are extremely threatening and impact the metagame in a major way. These Pokemon can either fulfill a variety of roles or are superlative in performing one task on a team. Landorus-T Metagross (Mega) Tapu Lele A Rank: A Rank Pokemon are the bread-and-butter of the tier, usually filling most roles in a team in the most efficient way the tier can offer. They will easily fit into a team and often define the style of play. They are not as overwhelming a presence as S Rank Pokemon but will almost always perform well. A+ Rank Ash Greninja Celesteela Greninja Heatran Magearna Tapu Fini A Rank Alakazam (Mega) Buzzwole Charizard (Mega-X) Ferrothorn Garchomp Hoopa-U Magnezone Manaphy Tapu Bulu Tapu Koko Venusaur (Mega) Zygarde A- Rank Amoonguss Charizard (Mega-Y) Excadrill Jirachi Latios Marowak (Alolan) Pinsir (Mega) Rotom-W Scizor (Mega) Skarmory Tornadus-T Toxapex Tyranitar Volcarona Zygarde-10% B Rank: B Rank Pokemon are less easily able to slot into a team as A Rank Pokemon, but are still able to fill a role well and be a presence in the right team. Pokemon which may be slightly outperformed by higher ranks but nonetheless still fit well, and Pokemon which have a threatening but small niche may be in this rank. B+ Rank Bisharp Chansey Clefable Dragonite Dugtrio Gengar Gyarados Kartana Kyurem-B Pelipper Sableye (Mega) Salamence Serperior Tangrowth Terrakion Thundurus Weavile Zapdos B Rank Gliscor Gyarados (Mega) Keldeo Kingdra Mantine Nihilego Porygon-Z Slowbro Volcanion B- Rank Aerodactyl (Mega) Breloom Latias Mamoswine Mew Omastar Sharpedo (Mega) Suicune Slowbro (Mega) Slowking Starmie Togekiss C Rank: C Rank Pokemon have notable niches in the metagame, but usually require significant support. These Pokemon face competition for their roles from the higher ranked Pokemon but can find still find use. C+ Rank Absol (Mega) Alomomola Azumarill Crawdaunt Diggersby Gastrodon Hippowdon Klefki Mandibuzz Mimikyu Muk (Alolan) Minior Necrozma Nidoking Ninetales (Alolan) Scolipede Shedinja Torkoal Thundurus-T Xurkitree C Rank Azelf Dragalge Empoleon Garchomp (Mega) Kabutops Kyurem Magneton Reuniclus Shuckle Smeargle Whimsicott C- Rank Bewear Cofagrigus Decidueye Hawlucha Hydreigon Primarina Seismitoad Talonflame Tentacruel Victini Blacklist: A special ranking for the pokemon that are widely believed to be viable or see fair usage, but aren't actually viable, nor practical to use due to being entirely obsoleted, plain bad, or a variety of other reasons. Finchinator Discuss.