We didn't have any deal set up yet.

Get back to me when you know anything you need. I'm almost done SoulSilver's Johto section (just gotta beat Clair and get to Victory Road/Elite Four, then train like hell the ones I need for the challenge) so I will soon be taking up the Platinum/Pearl challenges simultaneously (on two systems) and someday trading Pokémon back and forth between SoulSilver and one of those games, so I'll be able to come up with a lot of new Pokémon that are not in Black/White too.
(The virtually infinite Stones thanks to the PokéAthlon makes this a lovely way to get everything into my Black game, and some into White 2!)