[RotatingAtom]

After browsing through this thread of awesomeness again, I have another question.

I want to RNG my starter as soon as I start my adventure in B/W.
I obviously can't use C-Gear-Seeds for that.
Is there any kind of "calibration" I have to do before I can attempt to RNG
in B/W? Someone mentioned something about there being a "secret number"
that differs between cartridges and is used to determine your inital seed.
Do I have to advance far enough in the story to encounter high-level'd wild
Pokémon to determine their IV's and make it possible for RNG Reporter to
calculate that "secret number" that my cartridge has? Or can I just RNG
right from the start?

Thanks in advance for replying! :)