From 15th July (Sat) to 23rd July (Sun), Eevee Friends was distributed via Infrared,
to players that visited the Pokemon Pop-up Store at Hyundai Department Store Shinchon Station Underground 2F Connection Passage Graduation Tempyo.
This is a once per day event, meaning it'll take 8 different days to collect all the Eeveelutions.
This page has the WC7 and also photographs of the physical location, courtesy of @BLACKBIRD & @katsuya!
Distributions of the same event: