Re: Official Pokemon Discussion Thread!
PokéRus is a virus that goes after 3 days and once it's gone, you can't get it back on that Pokemon! Best way to work with it is to stick it in your PC as that both Spreads the Virus and Halts the recovery! It doesn't help growth as in Experience though, it just doubles the amount of EV's that your Pokemon gains from a battle.
(Also, I think it has to be new copies of B/W2.)