Here's mine speculation...
0. Achroma (???) (Hiougi City): training gym like the dojo in FRLG
1. Homika (poison) (City at the water): Venipede 12, Koffing 14
2. Lenora (Normal) (Nacrene City): Herdier 18, Watchhog 20, Bouffulant 20
3. Burgh (Bug) (Castelia City): Dwebble 22, Bee pokémon 1st stage 4th gen 22, Leavanny 23
4. Elesa (Electric) (Nimbasa City): Emolga 24, Joltik 25, Tynamo 25, Zebstrika 27
5. Son of Clay (Steel) (Driftveil City): Klink 31, Ferroseed 32, Excadrill 33, Durant 34
6. Skyla (Flying) (Airport City): Rufflet/Vallyby 35, Togetic 36, Skarmory 36, Tranquill 38
7. Shizui (Water) (Undella Islands): Golduck 40, Alomomola 41, Mantine 41, Sharpedo 43
8. Iris/Drayden (Dragon) (Dragon City): Zweilous 45, Fraxure 46, Druddigon 46, Haxorus 48