Good sprites and Merry Xmas man!! :thumbsup:
Supreme work!! Love your Fido Dido!! :w00t:
I think you can add more shades to your sprites, honestly. It's ok as flat style, but you can smooth the outlines by adding more darker shades and anti-alias effects between the flat inner colors and the dark outline. Also darker color for shadows + 1 pixel of anti-alias could make the sprites look awesome.
:o love to see this actualized.(https://i.imgur.com/fT4VaR5.gif)