Part 12: Cleared Kahuna Hapu — Exeggutor Island

Cleared Kahuna Hapu — Exeggutor Island opens 4 areas.

Where to go

1. Aether Paradise

   Wild: Type: Null Lv 40

2. Exeggutor Island

   Wild: Castform 54.5% · Lv 40-43, Sliggoo 45.5% · Lv 40-43, Exeggcute 40% · Lv 40-43, Pelipper 30% · Lv 40-43 +3 more

3. Hau'oli City

   Wild: Happiny 50% · Lv 5-8, Pikachu 50% · Lv 5-8, Abra 20.8% · Lv 5-8, Rattata (Alola) 16.7% · Lv 5-8 +7 more

4. Poké Pelago

   Wild: Carbink Lv 49-55, Drifblim Lv 49-55, Emolga Lv 49-55, Fletchling Lv 49-55 +22 more

Everything you can have caught by this checkpoint · Open the interactive guide

It also doesn't say when New Mauville opens up, so it is in no part above; it has its own route page.