I haven't asked someone to Pokeshift for me before, so tell me if I have this right:
-I trade the pokes from a 4th gen game to your 4th gen game
-You Pokeshift them to your 5th gen game (since you have two ds's)
-Then they're traded back to my 5th gen game
^^Right?
Also, what do you want in return for Pokeshifting?