Super Smash Bros. Ultimate Ripping Project

[Worldblender]

I think I found another program that could help with the textures (nutexb), called Switch-Toolbox, found at https://github.com/KillzXGaming/Switch-Toolbox.
The author is nice enough to provide binary releases of this program, at https://github.com/KillzXGaming/Switch-Toolbox/releases. Like I said, it may not help with the models (numdlb), but it helps significantly with the textures. They can be exported without them being turned dark. However, I might have to rename and reorganize the exported textures afterwards.