They look pretty neat, the Chomby's lineart and coloring are pretty solid.
The only problem I see is the proportion. Seems like that's your weakness
Here are some tips regarding proportion: (I'm always picky with artwork proportion
)
Chomby
-the base of the tail should be significantly thicker than the end
Ixi
-the head should be rounder, try fixing the line under its left ear
-the neck isn't
that long
Finally, the Ixi's wing should be colored with something more solid, otherwise it looks somewhat detached...
The coloring, especially the Chomby's, looks great.
As if they are both drawn by different people
Either because of the linearts, or you're just being lazy with the Ixi