Part 2: Beat Viola — Santalune City Gym, badge 1

Beat Viola — Santalune City Gym, badge 1 opens 1 area.

Where to go

1. Route 4

   Wild: Flabébé 35% · Lv 6-8, Combee 30% · Lv 6-8, Ledyba 30% · Lv 6-8, Budew 10% · Lv 8 +2 more

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

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