From Bulbapedia, the community-driven Pokémon encyclopedia.
Yōsuke (Japanese: ヨースケ Yōsuke) is a member of Team Great Rocket from Pokémon Card GB2: Here Comes Team GR!. He is one of the Trainers in the GR Psychic Stronghold.
His deck, Bad Dream Deck (Japanese: バッドドリームデッキ), focuses on Pokémon. Yōsuke refuses to duel against the player unless their deck has at least six Gastly and Haunter cards in total—Dark Haunter cards do not count toward this total.
Bad Dream Deck
When defeated, he gives out one of both We Are Team Rocket and Legendary Power booster packs.