Tuxedo Style: Glaceon and Tuxedo Style: Gengar Holowear have both been added to Pokémon UNITE. Glaceon's Holowear costs 1050 Gems while Gengar's Holowear costs 400 Gems. Glaceon has the special Movement animations.
Sources:
https://twitter.com/poke_unite_jp/status/1574186994850140161 and
https://twitter.com/PokemonUnite/status/1571650283331100674