Oh? There are ways of using say a slot 1 DS flash kart and a retail Pokemon slot two game? my Google Fu must not be worded correctly then. Might I have a helpful point in the right direction? That or I'll keep looking around these forms if I missed it or so forth.
But the idea of having that GC controller link cable work with an Emu might oddly be a neat programming mod.
Edit: correcting something, I have a Slot 1 DS R4. I do not have a slot 2 GBA storage cart. I do have GBA Fire Red, Leaf Green, Emerald carts. Say I play a Ruby Rom on my PC. Catch a bunch of pokemon, and want to transfer them to my Fire Red game. Is that possible? Also I do not want to buy a Slot 2 rom cart mostly cause I see that as something of a waste to purchase this day and age. Also I have no intention of migrating pokemon to a DS game just yet, that is not the point of what I am trying to do here.