TCG Island in Pokémon Card GB 2GR Island in the game
The Trading Card Game Islands are the setting of the Pokémon Trading Card Game games. The region consists of two small islands, TCG Island, which appeared in both games, and GR Island, which appeared alongside the original island in the second game only, much like Kanto and Johto did in Generation II.
As the game is focused on playing with Pokémon Cards, it is unclear if real Pokémon exist somewhere in the region, or even if it is set in the same universe as the other regions.