Editing Pokemon Type Advantage?

[megamonk4]

Hello, I looked around the forums to see if there is currently any info on how to change type advantages (EX: allowing poison moves to hit steel types instead of being ineffective) for any of the past pokemon DS games(D/P/Pt/HG/SS/BW/BW2), but i didn't find anything. Any help on this info would be greatly appreciated.

[Kaphotics]

http://projectpokemon.org/forums/showthread.php?24589-B2W2-General-ROM-Info&p=160511&viewfull=1#post160511