Banlist so far for quarterfinalists (will update later):
FC (Urshifu-R, Slowbro, Tapu Bulu, Blissey, Articuno, Dragapult, Zygarde, Silvally (Normal), Mew, Avalugg, Tornadus-Therian, Zeraora)
Career Ended (Arctozolt, Rotom-W, Tornadus-T, Ninetales-A, Incineroar, Sandslash-A, Tapu Lele, Alakazam, Urshifu-R, Rhyperior, Blissey, Articuno)
Fluore (Obstagoon, Slowbro, Blacephalon, Tapu Bulu, Rhyperior, Weezing-Galar, Ninetales-Alola, Arctozolt, Tapu Koko, Urshifu-R, Articuno, Sandslash-Alola)
longhiep341 (Pelipper, Barraskewda, Rhyperior, Seismitoad, Volcarona, Maractus, Abomasnow, Arctovish, Arctozolt, Tornadus-T, Aurorus, Golisopod)
PokemonFanboys (Krookodile, Chandelure, Slowking, Xatu, Articuno, Zamazenta-Crowned, Mew, Suicune, Slowbro, Goodra, Glastrier, Landorus-Therian)
Mr.Bossaru (Slowking-G, Gengar, Marowak-A, Toxapex, Azumarill, Cresselia, Toxtricity, Thwackey, Scyther, Azelf, Mimikyu, Celebi)
PociekMociek (Arcanine, Rhyperior, Chansey, Scyther, Tapu Koko, Zarude, Weavile, Barraskewda, Zapdos-Galar, Dragapult, Snorlax, Blissey)
Quantum Tesseract (Doublade, Grookey, Clefable, Hydreigon, Frosmoth, Scyther, Linoone, Victini, Quagsire, Azumarill, Mamoswine, Zapdos)
Edit: Also first blood ggs. One speed tie really decided the whole game.
https://replay.pokemonshowdown.com/gen8inverse-1605282236-hyebd93ct0u7uwo9lb5r2cl61cec3o0pw