Great animations you have there. I particularly like the subtle movement in the breast area.
What I don't like that much are the overblured eyes. A bit more contrast and definition ther would make these pieces perfect (for my taste). There are some minor banding issues too, but it's not that striking during the animation.
Agree with you, Manupix, on removing the shadow. Straight upload the game work and didn't think too much of it.... hahah. Will find time do it.
I didn't follow the 8-bit rules when working on these characters, so yeah, face is a bit blurly. But no soft/blur tools were used. Greast suhhestions on the arm colors, will keep that in mind. 
You should remove this shadow then as well as the ground patch, they don't add much to the piece and rather conflict with the default PJ background.
Even without the shadow greys, that's a lot of colors. I'd say soft tools 
were used elsewhere, like the face, as that's where the pixeling of these otherwise awesome sprites is the weakest (poorly defined eyes and mouths).
Also the arm outlines are not so nice. Better just keep them on one side as shadows, if at all.
ProMotion doesn't popular somehow but it's a pretty good pixel art tool to me.
http://www.cosmigo.com/promotion/index.php
These animations were made pixel by pixel, frame by frame, it was a fun project to worked on. The only thing not so in pixel art style is shadow, shadow was made in photoshop for the game needs.
I don't know that software... but that it means the art is not pixel art?
I like this but mmm, something makes me think these animations are vector made.
Great!