I agree with the other comments.
I only wish ths had a lighter background to it, as the default PJ background colors are causing many of the outlines to show up as blur instead of adding to the crisp-ness of it.
There is a wonderful consistency across these characters and the colouring between the purples and the flesh tones is really effective/ lso incredibly crisp and fluid line to them, you seem to have managed to do almost everything at 90 and 45 degree angles with very few awkward curves and little need for anti-aliasing (barring the legs) and it makes this look so clean; as eishiya said, you could almost orget that they are pixels at all. Very impressive.
That is some super-smart use of regular lines to avoid needing AA. Unf <3 Linked these to a friend, they didn't believe at first glance that these were pixel art.
amazing!