An Alolan Security Corps member has a request involving the unusual Vulpix that he has.
The Request
To get this request, you need to catch a Vulpix. Vulpix can only be found on Veilstone Cape in the Cobalt Coastlands, and only appears rarely. Its location is southwest of Seaside Hollow, on the high part of the land, but usually there is a Glameow there instead. Keep visiting and revisiting the area until a Vulpix appears there, and catch it. Then check the blackboard in Professor Laventon's office in Galaxy Hall in Jubilife Village to accept this request.
Speak with Keaka
Go to Snowfields Camp in the Alabaster Icelands and talk to Keaka.
Find the Five Vulpix
The five Vulpix are all in the Avalanche Slopes area.
Report to Keaka
After you find all five Vulpix, go back to Snowfields Camp and talk to Keaka.
Reward
You get 1 Exp. Candy L. You also receive an Alolan Vulpix.