B/W - Type Weakness

[elementking]

As the title states, I'm looking for where and how the type weakness data is stored. I've looked for months and have found nothing. If anyone has any clue on it, please inform me.

[Shiny Sheimi]

I can't help you on where the information is stored but I can imagine editing type effectiveness information on B/W will be a tricky task - there's discussion on this thread on the mechanics of Gen IV type effectiveness data and somebody did ask if the B/W mechanics were the same, but unfortunately they are not and as it says on the thread, nobody has been able to find the data as of yet. Good luck finding this though, I'd be interested to see how you dealt with it.