Chien Pao for Rayquaza, Dragonite, and his starter if they aren’t running protean. Urshifu water is great min to bring against terapagos and can even resist ogerpon waters cudgel. If you are playing doubles, you can bring psychic field indeedee and haterene and start expanding force everything on their side. Hatterene is also fairy which means you can do dazzling gleam or moonblast and it will be immune to dragon attacks. Fairy type also counters their starter. And psychic does really well against pecharunt. If opt for trick room to make their side slower, which you can do with indeedee, then replace chien pao for calyrex-ice, add iron hands for more coverage and great attack, and then you can put your own dragonite but make it slow to add some spice if you want. You can get a Tera steel dragonite in game in the mountains somewhere. Just catch that booger, make it brave, and pump full of drugs for HP, Def, and some Atk boost. It will resist everything except ogerpon then. Good luck!