The Pokémon Center Japan has announced that they will sell three new plushies from the Hisui region in Pokémon LEGENDS Arceus. Ayashishi, Idaito, and Galar Warrgle will be available to purchase on February 17th, 2022 for 2200 yen each. High resolution photos of the plushies have been added to an Imageboard thread.

Item List (English):

Plushie Galar Warrgle - 2,200 yen
Plushie Idaito - 2,200 yen
Plushie Ayashishi - 2,200 yen

Item List (Japanese):

ぬいぐるみ ヒスイウォーグル 2,200円
ぬいぐるみ イダイトウ 2,200円
ぬいぐるみ アヤシシ 2,200円

Sources: https://twitter.com/Pokemon_cojp/status/1494114397429587968 and https://www.pokemoncenter-online.com/