Hacking How do you trade between legitimate Pokemon White and DSTwo

[Pluupy]

Little sister wants a pokemon I have in White 2. I dont actually have a legit cart though, its just my DSTwo. So she lends me her DSlite for me to trade but the infared trading doesnt work. How else can I trade her the Pokemon if this isnt working? (also why doesnt it work??)

Edit: DERP. I forgot that BW still had the link community in the Pokemon Center. lol Sis' pokemon successfully traded! n_n