Walkthrough: Blush Mountain is a small mountain located just off Route 12. Here, the Geomthermal Plant can be found, which powers all of The Alola Region with free energy. There's not much to this location outside of the Wild Pokemon.
Wild Pokemon:
Grasses (Levels 27-30): Geodude(30%), Mudbray(20%), Elekid(10%), Togedemaru(10%), Turtonator(10%), Torkoal(10%), Charjabug(10%)
SOS Pokemon #1 (Levels 27-30): Geodude, Mudsbray, Electabuzz, Togedemaru, Turtonator, Torkoal, Charjabug
SOS Pokemon #2 (Levels 27-30): Geodude, Mudsbray, Chansey, Togedemaru, Turtonator, Torkoal, Charjabug
SOS Pokemon #3 (Levels 27-30): Geodude, Mudsbray, Elekid, Togedemaru, Turtonator, Torkoal, Charjabug
Zygarde Cells: There is one Zygarde Cell found here.
Trainers:
Office Worker Shane - Level 29 Psyduck, Level 30 Fearow
Items:
TM63 Embargo - From Scientist Inside During Day
Timer Ball - In Front of Truck
Sun Stone - Southwest Area
Lure Ball - From Samson Oak
Zinc - Patch of Grass (Hidden)
Post Storyline
Details: During the Eevee Quest in the Post Game, you will find the Espeon User here.
Espeon User Ishaan - Level 55 Espeon