I did not see anyone post this thread, and I almost missed this entirely. Also I had to look up these characters' English names, so I hope i have that right. Anyways, this is a character from SM series's Steenee. There is nothing special, but acquisition is via Serial Code.
Species: Steenee
Item: Yellow Nectar
OT: 마오 (Mao)
ID: 170919
Nature: Naive
Gender: Female
Ability: Leaf Guard
Ball: Precious Ball
Ribbon: Classic Ribbon
Techniques:
Magical Leaf
Doubleslap
Sweet Scent
Acquisition Method: Serial Code ALOLASTEW762
Event Date: The event started at 18 September 2017 at 18:00, but I do not see the information on where it ends in the site. I gave the site a cursory look so I may have missed something.
Misc Information: The code reveal is tied to the episode which aired during the following dates:
애니맥스 (Animax) : 19 September 6 PM
대교 (Daegyo) : 19 September 7 PM
KBS Kids : 19 September 6:45 PM
IVs are randomised. There is nothing else that seems to be interesting about this event. How did it fly under the radar here I don't know.
Source: https://story.kakao.com/ch/pokemonkorea/KUcPYVb4ZFA