Part 9: Cleared Acerola's trial — Thrifty Megamart

Cleared Acerola's trial — Thrifty Megamart opens 4 areas.

Where to go

1. Route 15

   Wild: Crabrawler 100% · Lv 30-33, Gyarados 100% · Lv 10-33, Magikarp 79% · Lv 10-33, Finneon 40% · Lv 30-33 +8 more

2. Route 16

   Wild: Crabrawler 100% · Lv 30-33, Pelipper 38.5% · Lv 30-33, Gumshoos 23.1% · Lv 30-33, Raticate (Alola) 23.1% · Lv 30-33 +4 more

3. Route 17

   Wild: Crabrawler 100% · Lv 31-34, Kartana 100% · Lv 60, Castform 81.5% · Lv 31-34, Pangoro 41.7% · Lv 31-34 +9 more

4. Ula’ula Meadow

   Wild: Cottonee 25% · Lv 31-34, Petilil 25% · Lv 31-34, Ribombee 25% · Lv 31-34, Ariados 16.7% · Lv 31-34 +3 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.