The only Hoenn region Pokémon that have appeared in the game thus far were the ghost Pokémon from this year’s Halloween event.
The Pokémon GO app launched in select countries including the United States in July 2016, and has since launched in more than 50 countries.
The developer cited Treecko, Torchic, and Mudkip, while the video preview shows Groudon, Salamance, Shiftry, Aggron, and Ludicolo.
Niantic announced on Wednesday that it will begin adding more Pokémon from the Hoenn region (creatures that first appeared in the generation three games Pokémon Ruby and Pokémon Sapphire) later this week and in coming weeks.