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Banlists

RU by usage
Pokemon that have attained >= ~4.52% in usage in a given tournament season will rise to NatDex RU
Pokemon that drop to RU in an official tier shift will remain in RU until end of season usage determines otherwise

Absol-Mega
Aggron-Mega
Archaludon
Amoonguss
Arctozolt
Azumarill
Banette-Mega
Basculegion-F
Blissey
Cobalion
Crobat
Cyclizar
Diggersby
Gastrodon
Gligar
Golisopod
Grafaiai
Grimmsnarl
Iron Jugulis
Krookodile
Latias
Lokix
Lucario
Mandibuzz
Manectric-Mega
Nidoking
Okidogi
Pidgeot-Mega
Primarina
Regieleki
Rhyperior
Rotom-Heat
Sandy Shocks
Sceptile-Mega
Sharpedo-Mega
Skeledirge
Slither Wing
Slowking
Steelix-Mega
Talonflame
Tangrowth
Tapu Bulu
Thundurus
Tinkaton
Togekiss
Volcanion
Weezing-Galar
Zarude


NUBL
A comprehensive list of every Pokemon banned from National Dex NU, Pokemon with a (✝) are banned from NU but have since risen to a higher tier or banlist

Arctozolt ✝
Azumarill ✝
Basculegion-F ✝
Breloom
Chandelure
Conkeldurr ✝
Deoxys-Defense
Diggersby ✝
Durant
Flamigo
Haxorus ✝
Infernape
Iron Jugulis ✝
Lycanroc-Dusk
Manectric-Mega ✝
Mienshao ✝
Necrozma
Nidoking ✝
Ogerpon
Polteageist
Primarina ✝
Scolipede ✝
Sharpedo-Mega ✝
Slither Wing ✝
Staraptor
Thundurus ✝
Zarude ✝
Zeraora ✝
Zygarde-10%


The following is also banned from National Dex NU:
- Terastallization
- Drought
- Drizzle
- Light Clay

Challenge Code

/challenge gen9nationaldexru @@@ -Absol-Mega, -Aggron-Mega, -Archaludon, -Arctozolt, -Azumarill, -Banette-Mega, -Basculegion-F, -Blissey, -Cobalion, -Crobat, -Cyclizar, -Diggersby, -Gastrodon, -Gligar, -Golisopod, -Grafaiai, -Grimmsnarl, -Iron Jugulis, -Krookodile, -Latias, -Lokix, -Lucario, -Mandibuzz, -Manectric-Mega, -Nidoking, -Okidogi, -Pidgeot-Mega, -Primarina, -Regieleki, -Rhyperior, -Rotom-Heat, -Sandy Shocks, -Sceptile-Mega, -Sharpedo-Mega, -Skeledirge, -Slither Wing, -Slowking, -Steelix-Mega, -Talonflame, -Tangrowth, -Tapu Bulu, -Thundurus, -Tinkaton, -Togekiss, -Volcanion, -Weezing-Galar, -Zarude, -Breloom, -Chandelure, -Durant, -Flamigo, -Infernape, -Lycanroc-Dusk, -Necrozma, -Polteageist, -Staraptor, -Zygarde-10%

Resources

Runo's personal viability list
Good Pokemon
Aracanine-Hisui Azelf Barbaracle Barraskewda Bronzong Chesnaught Crawdaunt Empoleon Enamorus-Therian Feraligatr Fezandipiti Flygon Goodra-Hisui Heracross Houndoom-Mega Kilowattrel Kleavor Maushold Metagross Milotic Mimikyu Munkidori Nidoqueen Nihilego Noivern Obstagoon Raikou Regidrago Registeel Reuniclus Revavroom Roserade Seismitoad Sharpedo Sinistcha Slowbro-Galar Slowbro-Mega Starmie Suicune Swampert Swampert-Mega Sylveon Tentacruel Tornadus Toxtricity Typhlosion-Hisui Umbreon

Decent Pokemon
Aerodactyl Ampharos-Mega Armarouge Basculegion Bewear Blastoise Celebi Cetitan Cloyster Cresselia Darmanitan Decidueye-Hisui Diancie Dracozolt Dragalge Emboar Entei Escavalier Espeon Forretress Froslass Gallade Gardevoir Gigalith Golurk Heliolisk Incineroar Indeedee Iron Thorns Jellicent Kingdra Klefki Machamp Mantine Marowak-Alola Medicham Mismagius Muk-Alola Ninetales-Alola Oricorio-Pom-Pom Oricorio-Sensu Orthworm Overqwil Pangoro Passimian Pawmot Pincurchin Porygon2 Raichu-Alola Ribombee Rotom-Mow Salazzle Scream Tail Shaymin Slurpuff Snorlax Stakataka Steelix Tauros-Paldea-Aqua Tauros-Paldea-Blaze Toxicroak Vanilluxe Vaporeon Venomoth Xatu

Niche Pokemon
Abomasnow-Mega Araquanid Arctovish Articuno Articuno-Galar Aurorus Avalugg Bombirdier Brambleghast Braviary-Hisui Brute Bonnet Bruxish Camerupt-Mega Cinccino Cofagrigus Copperajah Decidueye Delphox Dhelmise Ditto Donphan Doublade Drampa Drapion Drednaw Eldegoss Electrode-Hisui Exeggutor-Alola Exploud Florges Galvantula Garbodor Glalie-Mega Glastrier Guzzlord Hariyama Hitmonlee Hoopa Houndstone Inteleon Lanturn Ludicolo Lycanroc Mudsdale Palossand Pyukumuku Quagsire Sableye Sandslash Sandslash-Alola Sceptile Scrafty Shedinja Sigilyph Swellow Tatsugiri Torterra Tyrantrum Magneton Sneasel Sneasel-Hisui Vileplume Virizion Weezing Whimsicott Wo-Chien