My Pokémon games still hold their saves, about 20 years after I got them. I turned on my GBC and checked a few months ago and the saves were amazingly still the

My Pokémon games still hold their saves, about 20 years after I got them. I turned on my GBC and checked a few months ago and the saves were amazingly still there then. I want to dump the save files but I haven’t quite found the right equipment at the right price. Does anyone know of some electronics that are not too expensive and that can be used to dump the save games onto a Linux computer?