Update: The official page for Poltchageist has now been uploaded onto the Pokémon Scarlet & Violet website.
New details reveal that the matcha Pokémon can come with a brand new ability, Hospitality. This ability is really helpful for double battles as if Poltchageist is brought out during the fight, it will heal a small amount of its ally's health.
The Pokémon is also pretty fond of old houses, and will only venture outside and around towns at night. The webpage also confirms its links to Sinistea by confirming that the two Pokémon have a similar swirl — except that the matcha Pokémon's swirl isn't its weak point.
Original article: A new teaser trailer for Pokémon Scarlet & Violet - The Hidden Treasure of Area Zero has revealed a brand new Pokémon — Poltchageist, a Pokémon inspired by matcha.
The trailer is framed like an ancient Japanese folklore tale and tells the story of the spooky tea Pokémon. Poltchageist is a Grass/Ghost-type Pokémon and looks to be a bit of a trickster. Given its name and theming, it looks like this could be related to Sinistea and Polteageist.
Poltchageist will be making its debut in part one of the DLC, The Teal Mask, which launches on 13th September. You can find out about all of the new Pokémon making their debut in the Kitakami region in our guide: