Part 3: Beat Clemont — Lumiose City Gym, badge 5

Beat Clemont — Lumiose City Gym, badge 5 opens 17 areas.

Where to go

1. Ambrette Town

   Wild: Luvdisc 100% · Lv 15, Tentacool 69% · Lv 25-27, Dwebble 66% · Lv 18-20, Clauncher 65% · Lv 25 +8 more

2. Cyllage City

   Wild: Luvdisc 100% · Lv 15, Tentacool 69% · Lv 25-27, Dwebble 66% · Lv 13-15, Clauncher 65% · Lv 25 +9 more

3. Shalour City

   Wild: Luvdisc 100% · Lv 15, Tentacool 84% · Lv 25-27, Remoraid 65% · Lv 25, Alomomola 60% · Lv 35 +4 more

4. Route 5

   Wild: Gulpin 57.1% · Lv 5, Scraggy 33.3% · Lv 5, Bunnelby 30% · Lv 8-10, Skiddo 30% · Lv 8-10 +6 more

5. Route 6

   Wild: Venipede 80% · Lv 10-12, Oddish 30% · Lv 10-12, Audino 20% · Lv 10-12, Espurr 20% · Lv 11-12 +4 more

6. Route 7

   Wild: Hoppip 60% · Lv 7, Croagunk 35% · Lv 12-14, Flabébé 35% · Lv 12-14, Psyduck 35% · Lv 7 +8 more

7. Route 8

   Wild: Luvdisc 100% · Lv 15, Tentacool 69% · Lv 25-27, Dwebble 66% · Lv 18-20, Clauncher 65% · Lv 25 +20 more

8. Route 9

   Wild: Hippopotas 40% · Lv 15-17, Sandile 40% · Lv 15-17, Helioptile 20% · Lv 15-17

9. Route 10

   Wild: Nosepass 60% · Lv 10, Yanma 35% · Lv 10, Golett 30% · Lv 19-21, Snubbull 30% · Lv 19-21 +6 more

10. Route 11

    Wild: Nidoran♀ 37.5% · Lv 11, Nidoran♂ 37.5% · Lv 11, Stunky 21.9% · Lv 11, Hariyama 20% · Lv 22-23 +8 more

11. Route 12

    Wild: Luvdisc 100% · Lv 15, Tentacool 84% · Lv 25-27, Dwebble 66% · Lv 23-25, Remoraid 65% · Lv 25 +18 more

12. Route 13

    Wild: Graveler 66% · Lv 26-28, Dugtrio 40% · Lv 26-28, Trapinch 40% · Lv 26-28, Slugma 34% · Lv 26-28 +1 more

13. Route 14

    Wild: Poliwag 100% · Lv 15, Barboach 65% · Lv 25-35, Poliwhirl 65% · Lv 35, Bellsprout 60% · Lv 16 +11 more

14. Parfum Palace

    Wild: Magikarp 100% · Lv 15, Goldeen 65% · Lv 25, Gyarados 60% · Lv 35, Corphish 35% · Lv 25 +2 more

15. Reflection Cave

    Wild: Woobat 85% · Lv 21-23, Mime Jr. 57.1% · Lv 11, Roggenrola 38.1% · Lv 11, Mr. Mime 20% · Lv 22-23 +6 more

16. Lumiose City

    Wild: Bulbasaur Lv 10, Charmander Lv 10, Squirtle Lv 10

17. Tower of Mastery

    Wild: Lucario Lv 32

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.