Eevee Uniform .

Alongside the Pikachu Uniform, this gift was given to players via unique serial code, for prepurchasing DLC: Season 1 Expansion - The Isle of Armor and The Crown Tundra.
Presumably, purchases must be made before June 30, 2020, to qualify. Redemption end date of the code is presently unknown.

Format Ver.2.0.0-10b, Post Updated Date:20201027_2335