Quoted By:
>Ubers
Zygarde-100%, Lunala, Solgaleo
>OU
Silvally*, the whole Tapu quartet, Magearna, Poppmaid, Chadpod
>UU
Wishiwashi, Kommo-o, Turtonator, Marowak, Yeticrab, Type:Null, Luchalitten, Lycanroc-Midday, Salandit2, Raichu
>RU
Morelull2, Robinhoot, Drampa, Mimikyu, Mudsdale, Minior, Bewear, Bruxish, Ninetales, Exeggutor, Muk, Zygarde-10%
>NU
Vikavolt, Tsareena, Gumshoos, Oricorio Pompom, Oricorio Sensu, Comfey, Oranguru, Passimian
>PU
Lurantis, Komala, Ribombee, Pyukumuku, Oricorio Pau'u, Oricorio Baile, Togedemaru, Persian, Raticate, Sandslash
>Impossible to tell right now
Ultra Beasts(Will they even be allowed online?), Anchor, spiky lad, bubble spider, toucan, Dugtrio, Golem
*Since each Arceus is technically tiered individually by Smogon, Silvally will also probably be, too. I can see weaker Silvally types potentially dropping to lower tiers.