Fixing Gamma for Switch Textures

[FormerUser27]

I did not rip these models personally, but I've been wanting to use them for a while, the issue is that I can't figure out how to get the textures to look correct. Some characters look to light-colored, while others look to dark. I'm pretty positive it has something to do with the gamma of the texture. However, I can't seem to find a single value to works universally with all textures. What do I need to do to fix the textures?

Link: https://drive.google.com/drive/folders/1...drive_link