In pokemon white, when do you get to go trade for other pokemon from old pokemon games?

I want to use inferno for my elite 4 battle. How can I trade pokemon from other games? If not are their any good places I can train my pokemon so they can defeat the elite 4?|||After you beaten the elite four and finish the game (beaten team plasma), the poketransfer lab will be unlocked in route 15.|||If u read page 24 of the instruction booklet you'll find out that you need to finish the PKMN League (Elite 4 and someone from Plasma) and get the National Pokedex to be able to transfer "Inferno" and other PKMN older games. You transfer not trade.

EDIT: Route 15 has a lab whick u can use the Poketransfer, you can get their when u finish the PKMN League.



Victory road and the place before it are great places to train.|||your gonna hav to beat the elite four, and get the relocater. then u can trade from all ds games. but u cant do that yet. if u wanna train and stuff just go to the highest level wild type pokemon. go to www.serebii.net it has many pokemon info