Since I'm a pixel-lover myself, I decided to write a critique for an artist who, too, it making PixelArts.

However, I have to say that this piece definitely isn't a PixelArt. PixelArts are drawn without any Photoshop (or other grafic program's) filters and efects. Of course, the linearts of this guy seem to be a genuine PixelArt, nevertheless the coloration isn't. But well, that's not the point I want to stress, so I'll move on.

The Outlines are rather well done and clean. You might want to redo the tips of his hair, since there are a few weird pixels, looking slightly strange. Outlines should always contain colour and if it is impossible, because the strands (or whatever object we'll take for example) are too thin to continue, you should end them without additional outline-pixels.
Except of this, I do like the work you did with the lines, but in my opinion the lines around the iris are way too dark. I know, it probably is supposed to highlight the eyes and the different colours, but I think it's a bit overdone.

Next point. Anatomy. I like his upper body and arms, since both look correct and I especially like the way the perspective turns out. Well done! The legs in turn are not completely right. His left leg (the leg on the right side of the picture) should not go down all the way like the right one, since he is showing us his right side. It looks a bit, as if you hae mixed up the perspective you did so well with his arms. His left arm is a good way shorter than the right one - and this is correct because of the perspective, so the left leg is supposed to be shorter, too.
Another thing you might want to improve is the junction between hair and ears. I'm missing a kind of straight line that seperates the ears from the hair, since now it looks as if the ears are forming part of the hair, which they obviously aren't. A darker line - like those you used to highlight the strands of hair - would do.

What I really do like is the shading you did on his suit. It looks fairly realistic and as well light and shadows are very well done. Anyway, keep in mind that with the efects of a grafic programm this is not a real PixelArt, so I would like to see how you'd do the shading without filters and oppacity-settings.
The only thing I noticed, is the fact that the light source seems to change positions, since the light seems to come from the upper left corner if you look at head, shoulder and tail, weil his legs and chest give the impression that the light source is in the middle or even on the right side.

Since I am anything but an expert, I won't say anything concerning the animation - other people do have a better idea about it than me.

All in all I do like the way he turned out. There are a few smaller mistakes you could easily fix, but it's nothing too big. Nevertheless you should rethink calling this a PixelArt.

This is just wonderful. I love how you combined the regular him with the Fox him. It makes it look really cute. Unlike a lot of these that I have seen, your animations are really smooth and they move without the little pixels getting in the way. You did a rocking job on this and you captured the details really well. Their isn't a hair out of place in my opinion. His eyes and ears move very naturally along with his tail. Everything is timed perfectly. Again, you did a fantastic job on this animation. Keep up the good work!