This is a great resource, I have a couple of changes/additions to suggest:
- Remove Landorus-T and Mega Slowbro from Primal Groudon checks since neither of them handle mixed well.
- Remove Excadrill, Ferrothorn, and Celesteela from Necrozma-DM checks (former gets ohko'd by Earthquake, latter 2 can't actually threaten it) and rename it to "Swords Dance Necrozma-DM Checks"
- Remove Magearna, Ho-Oh, Ditto (why Ditto just for Unec?) from Ultra Necrozma checks, add Skarmory and Alolan Muk
- Remove Excadrill from Xerneas checks
- Remove Mega Salamence and Marshadow from Zygarde-C checks
- Remove Landorus-T from Swords Dance Arceus checks
- Remove Primal Kyogre and Landorus-T from Ho-Oh checks (former can get ohko'd by Brave Bird)
- Remove Giratina-O from Primal Kyogre checks
- Add Mega Gyarados and Darkrai to Dark-type resists
- Add Lunala to anti-offense Pokemon
- Remove Mega Scizor from anti-hazard support
- Remove Whimsicott/Darkrai from priority
- Marshadow checks: Arceus-Fairy, Arceus-Flying, Arceus-Poison, Zygarde-C, Xerneas, Yveltal, Ho-Oh, Mega Salamence, Mega Sableye, Primal Groudon, Toxapex, Buzzwole, Mega Venusaur, Tapu Lele, Landorus-T
- Yveltal checks: Magearna, Arceus-Fairy, Xerneas, Tyranitar, Arceus-Dark, Ho-Oh, Mega Diancie, Alolan Muk, Klefki, Tapu Koko, Chansey/Blissey
- Stallbreakers: Mega Gengar, Necrozma-DM, Ultra Necrozma, Primal Kyogre, Primal Groudon, Mega Salamence, Yveltal, Marshadow, Lunala, Naganadel, Gothitelle/Gothorita, Arceus-Dark/Arceus-Flying, Rayquaza, Mewtwo X, Mewtwo Y, Mega Gyarados, Darkrai, Palkia, Tapu Lele, Mega Diancie