https://www.gamespot.com/articles/pokemon-lets-go-pikachu-and-eevee-bring-back-jessi/1100-6460385/

Along with a new English trailer, The Pokemon Company has shared a Japanese theatrical trailer for Pokemon: Let's Go, Pikachu and Let's Go, Eevee. The ad showcases some more footage of the upcoming Nintendo Switch RPGs, but most notably, it gives fans their first look at a pair of familiar faces who will be returning in the games: Jessie and James of Team Rocket.

Just as in the classic Pokemon Yellow version--which served as the inspiration for the upcoming titles--it appears Jessie and James will play a recurring role in Let's Go, Pikachu and Let's Go, Eevee. In the theatrical trailer, which you can watch below, the villainous duo (along with Meowth) can be briefly seen confronting the protagonist in Mt. Moon.