I think it's even harder to see the shading now. xD The contrast is waaaay too low. You need a much more definition between shades. That darker shade needs to be far, far darker.

I couldn't actually tell where the anti-aliasing was because again the shades are just too similar. However I could tell that it was fuzzy and zoomed in and, well, anti-aliasing should be done sparingly, otherwise you have that fuzz effect. It's meant to soften edges and make it less pixelly but now it's hugging the entire lineart. You've got a lot of banding going on as well, which is when the shading doubles up with the lineart.

Banding

This video is good at showing how to anti-alias gently to make sprites less flat, but not fuzzy.

Also...the two bunnies together now have 80 colours in the palette . o__o By the way, it would be much easier to just work with the first one and get it finished before worrying about the shiny variant. Then you can just go into the colour palette and change each colour individually to make the shiny once the original is done. :) So you don't have to recolour it manually.