Part 2: Cleared Ilima's trial — Verdant Cavern

Cleared Ilima's trial — Verdant Cavern opens 3 areas.

Where to go

1. Route 3

   Wild: Crabrawler 100% · Lv 9-12, Salamence 100% · Lv 9-12, Spearow 70% · Lv 11-12, Rufflet 30% · Lv 11-12 +8 more

2. Kala’e Bay

   Wild: Gyarados 100% · Lv 10-15, Magikarp 79% · Lv 10-15, Finneon 40% · Lv 15-18, Tentacool 40% · Lv 15-18 +10 more

3. Verdant Cavern

   Wild: Rattata (Alola) 100% · Lv 11, Zubat 70% · Lv 8-11, Pheromosa 50% · Lv 60, Diglett (Alola) 30% · Lv 8-11

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.