Love the colors, poses, and the undetailed shadows. I think the horse could use a little more work. There's too much blank space and the forelegs look stumpy. If the front knees were pointing in the same direction, the pose would look more natural.
1first one reminds me of charmander from gundamn style!! woooaaa!!!
This is superb (and no, I won't make any undue comparisons). The colors used in the centaur thing are mind blowing. 
Ahah, you are awesome. Would have really made my day as an added bonus to see Potclean floating around Yupi. There are so many great characters in HxH.
Pitou
Great sprite of Hunter X Hunter