Psyduck, known as Koduck in Japan, is a Pokémon species in Nintendo and Game Freak's Pokémon franchise. Created by Ken Sugimori, Psyduck first appeared in the video games Pokémon Red and Blue and later in sequels. From Wikipedia
Players can earn bonus XP and Stardust, encounter holiday-themed Pokémon, and receive various rewards through the Winter Wishes, Frosty Festivities, and Winter Holiday Part 1 & 2 timed research tasks.