Pokémon Model Ripping Project

[SSonic360]

Does anyone know what the blue channel of the normal map for New Pokemon Snap models supposed to correspond to in Blender?

Blue channel does nothing. leave it unconnected with the B slot as 1 in the combine RGB

or, i'm guessing that the white bit is what's in the normal?

I looked through a few of the eye textures from some of the pokemon, and some of them use the blue channel like Typhlosion here; I know the blue channel doesn't contribute to normal map, but it may contribute to something else.