Pokemon Trading Has Been Tested On Nintendo Switch Online's Game Boy Emulator

Pokemon Gen 1 to 3 games haven
Pokemon Gen 1 to 3 games haven't officially made it onto NSO yet, but a programmer demonstrated that trading should work flawlessly.

Pokemon Trading Card Game (Game Boy) Release Date, News & Reviews

22 Game Boy Advance Games We'd Love To See Added To Nintendo Switch Online

Pokemon Trading Has Been Tested On Nintendo Switch Online's Game Boy Emulator

Nintendo Switch Online Game Boy and Game Boy Advance games

Flipper Zero - Game Boy (Pokemon Trading) : r/flipperzero

Game Boy/GBA Emulation on the NintendoSwitch is Impressive

Nintendo Switch Online - Every NES, SNES, N64, Sega Genesis, Game Boy, And GBA Game Available

Pokémon Trading Card Game, Stadium 2 Joining Nintendo Switch Online Library - IGN

Find out how you can play Pokémon Stadium 2 and Pokémon Trading Card Game on Nintendo Switch! - News - Nintendo Official Site