I haven't tried making NES or GB ROMs yet, but I know that there is data on hex editing Pokémon Platinum.
It's the same tutorial as D/P, because the maps are in the same positions, there is some new maps as well, but I've been editing the models and the dimensions. I'm getting as good as gabe_k.
Maybe once a D/P/P map editor gets released, then I could do a GSC remake, and a RSE remake too.
And I'm doing good.
Hm, the blog feature just started yesterday, I think...
I might be able to make one soon, but do I have to have at least 5,000 posts before making one?
Because someone told me that, and I'm not sure... :\