>>46227415You absolute lose quality when you upscale an image with no additional smoothing or changes. You're never supposed to view the BW sprites at that size. What you're seeing is the finer details that are visible only through zooming in past the original intended size. They're games made specifically for a tiny ass screen.
I don't have a BW rom on my computer right now and I'm not digging it out so take this HGSS image. The more you zoom in, the more you start seeing details you weren't supposed to see like the shading, the outline work, etc. You can't just zoom in and expect it to be the same.