Walkthrough: After defeating the RR Episode, you can return to Poni Grove on your way to The Battle Tree. Many Wild Pokemon (and a few Trainers) are found here.
Island Scan Pokemon:
Eelektross
Wild Pokemon:
Initial Pokemon - Daytime (Levels 52-55): Trumbeak(30%), Zoroark(20%), Buneary(20%), Riolu(10%), Pinsir(10%), Heracross(10%)
S.O.S. Pokemon #1 - Daytime (Levels 52-55): Toucannon, Zoroark, Lopunny, Lucario, Pinsir, Heracross
S.O.S. Pokemon #2 - Daytime (Levels 52-55): Toucannon, Zoroark, Buneary, Riolu, Pinsir, Heracross
S.O.S. Pokemon #3 - Daytime (Levels 52-55): Trumbeak, Zoroark, Buneary, Happiny, Pinsir, Heracross
S.O.S. Pokemon #4 - Daytime (Levels 52-55): Trumbeak, Zoroark, Buneary, Riolu, Pinsir, Heracross
Initial Pokemon - Nighttime (Levels 52-55): Trumbeak(30%), Buneary(30%), Zoroark(20%), Pinsir(10%), Heracross(10%)
S.O.S. Pokemon #1 - Nighttime (Levels 52-55): Toucannon, Zoroark, Lopunny, Buneary, Pinsir, Heracross
S.O.S. Pokemon #2 - Nighttime (Levels 52-55): Toucannon, Buneary, Zoroark, Pinsir, Heracross
S.O.S. Pokemon #3 - Nighttime (Levels 52-55): Trumbeak, Buneary, Zoroark, Pinsir, Heracross
Trainers:
Black Belt Ross - Level 26 Mankey
Ace Trainer Jackson - Level 56 Huntail, Level 56 Marowak, Level 57 Braviary
Items:
Beast Ball - From Ultra Recon Squad During Ultra Beast Incident
Max Potion - East of Southern Entrance
X Sp.Atk - Near Black Belt Ross
Max Elixir (Hidden) - Between Eastern Grasses