Walkthrough: At the end of Poni Meadow is Resolution Cave, a place you might not visit on your way to The Battle Tree unless looking to find some rare items. Most players only visit Resolution Cave to find and capture Zygarde.
Wild Pokemon:
Initial Pokemon - Daytime (Levels 56-59): Golbat(40%), Dugtrio(30%), Druddigon(15%), Noivern(15%)
SOS Pokemon #1 - Daytime (Levels 56-59): Crobat, Dugtrio, Druddigon, Noivern
SOS Pokemon #2 - Daytime (Levels 56-59): Golbat, Dugtrio, Druddigon, Noivern
Initial Pokemon - Nighttime (Levels 56-59): Golbat(40%), Dugtrio(30%), Druddigon(15%), Noivern(15%)
SOS Pokemon #1 - Nighttime (Levels 56-59): Crobat, Dugtrio, Druddigon, Noivern
SOS Pokemon #2 - Nighttime (Levels 56-59): Golbat, Dugtrio, Druddigon, Noivern
SOS Pokemon #3 - Nighttime (Levels 56-59): Golbat, Dugtrio, Noivern, Druddigon
SOS Pokemon #4 - Nighttime (Levels 56-59): Golbat, Dugtrio, Durddigon, Noivern
Initial Pokemon (Levels 56-59): Noivern(40%), Druddigon(20%), Golbat(20%), Dugtrio(20%)
SOS Pokemon #1 (Levels 56-59): Noivern, Druddigon, Dugtrio, Golbat, Crobat
SOS Pokemon #2 (Levels 56-59): Noivern, Druddigon, Golbat, Dugtrio
Trainers:
Veteran Leticia - Level 61 Ribombee, Level 61 Bewear
Backpacker Maria - Level 59 Manetric
Hiker Travis - Level 59 Dugtrio, Level 59 Mudsdale
Items:
Power Weight - Near Veteran Leticia
Terrain Extender - Near Backpacker Maria
TM26 - Behind Tauros Rocks Near Backpacker Maria
Light Ball - Southwestern Basement
Adrenaline Orb - Northwestern Basement
Toxic Orb - Southeastern Basement
HP Up (Hidden) - Northwestern Rock On Ground Level
Big Nugget (Hidden) - Northeastern Basement