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.

Pokémon Trading Card Game on Switch - Is It Worth Playing in 2023?

Nintendo could be adding ability for players to add Pokemon to Pokemon Stadium - My Nintendo News

Trading Pokemon with the Nintendo Switch Online Emulator

Alleged Leaks Reveal Game Boy And Game Boy Advance Games Coming To Nintendo Switch Online - Bounding Into Comics

Is Nintendo Switch Online on the verge of receiving GBA titles? Recent reports would suggest so

Is the Game Boy & Game Boy Color title added to 'Nintendo Switch Online'? - GIGAZINE

Nintendo Switch Online Game Boy and Game Boy Advance games

The best fan-made Pokémon games

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Nintendo Switch Online Game Boy and Game Boy Advance games

Successful link cable Pokémon trade from openFPGA Game Boy Core (using Memories) to Game Boy Color (using Everdrive X7) : r/AnaloguePocket