General Threats -
Thundurus (both), Mega Heracross, Mega Gardevoir, Breloom, Blaziken, Mega Gyarados, Lanturn (Shark Bait), Magnezone/Magneton, Salamence, Rotom-Wash, Rotom-Fan, Rotom-Heat, Mega Sableye, Mega Lopunny, Volcarona, Zeraora, Weavile, Crawdaunt, Marowak-Alola, Muk-Alola, Tyranitar(-Mega), Mega Diancie, Tornadus-Therian, Dragonite, Diggersby, Tangrowth, Mega Audino, Hoopa-Unbound, Porygon-Z, Buzzwole, Scolipede, Conkeldurr, Clefable, Mega Charizard Y, Mantine, Mew, Shaymin, Excadrill, Typhlosion, Empoleon, Primarina, Haxorus, Lucario, Volcanion, Azelf, Scyther, Blacephalon and more
Weather and Terrains (setters and abusers separated by |) -
Rain (Drizzle is on the suspect radar, but building a team around it could prove it to be broken) - Mega Slowbro, Pelipper, Vaporeon, Politoed | Mega Swampert, Kingdra, Qwilfish, Ludicolo, Primarina, Crawdaunt
Hail (same thing with Drizzle applies here, probably even more so) - Ninetales-Alola, Cryogonal, Abomasnow(-Mega), Aurorus | Sandslash-Alola, Linoone, other setup sweepers
Sun - Torkoal, Mega Charizard Y, Sunflora, Moltres, Solrock | Leafeon, Typhlosion, Shiftry, Victreebel, Tangrowth, Volcarona, Volcanion, Darmanitan, Blacephalon
Sand - Tyranitar(-Mega) (!), Hippowdon, Lunatone, Gigalith | Excadrill (!), Lycanroc-Midday, Stoutland
Air Current - Swanna, Unfezant, Altaria, Driflblim | Flying-types
Shadow Sky - Spiritomb, Mega Houndoom, Umbreon | Dark and Ghost-types
Forecast - Maractus
Electric Terrain - Jolteon, Electrode, Ampharos | Electric-types
Misty Terrain - Sylveon, Aromatisse, Florges | Fairy-types, Pokemon that appreciate not being statused
Grassy Terrain - Leafeon, Roserade, Gogoat, Leavanny | Grass-types, Pokemon weak to Earthquake
Psychic Terrain - Espeon, Gothitelle, Hypno | Psychic-types, Pokemon prone to being revenge killed by priority
Surge Surfer - Sawsbuck
Unburden (Seeds/Weather Warrior's Crystal*) - Sceptile, Liepard, Slurpuff, Hitmonlee
Manual Trick Room - Dianice/Carbink, Musharna, Cresselia, Slowbro/king, Porygon2, Uxie | Crawdaunt, Marowak-Alola, Porygon2 (Eviolith), Conkeldurr, Lampent (Eviolith), Zwelious (Eviolith), other slow Pokemon
*keep in mind it's still glitched and only works in a few weathers
Other -
Housekeeping - Blissey, Wigglytuff
Dimension Warp - Porygon-Z, Azelf, Uxie