Vodacixi on 03 May 2023
Does unnoficcial stuff count?
If it does, this marvel from Aliexpress that allows you to dump your GB/GBC/GBA cartridges and copy your save files and inject them. Thanks to this, my original Pokémon Blue and Silver save files with a complete Pokédex will not be lost:
If we are talking legit stuff... I'm gonna say the Link Cable for both GB/C and GBA. I know, I'm a Game Boy sucker xD
