Originally Posted by Fat djbeardo
This may have already been asked, but how does one catch a Therian Forme genie in the dream radar with a good nature? My Tornadus is cruddy.
I actually think that's his nature: "Cruddy".
The nature is determined when you select the 3DS option from the Unova Link menu in BW2. Because the Pokemon are transferred directly to your PC storage, there is no way to soft-reset for natures or IVs. So, it then follows that there is also no way to influence the nature.
If you want good Pokemon from the DR, you're either going to have to get extremely
lucky or RNG them (which at this point is only possible for people with Mac computers).
Found this on gamefaqs, hope it helps.