I would like you to use less colors for that Zero, you got a bunch of unnecessary red in there.

To many of shades can make the sprite look bad.
It would seem that you only need 4 reds.
3 blues
3 grays
and 3 skin colors.
ONce I have time I'll reduce your color usage and you can see what I mean. :3

I didn't spend much time on it, just enough where you can see where I was going with this.

Update:
+ Zero PA is more PA like (with Qui's help of course :3) PA not complete tho, I has been very busy with school T_T
+ My Bridge of Eldin (still under works)

View this in the first post.

Looks a lot better, good job.
Arches under The Bridge of Eldin need work, that's all I see for now.