So I get to be the one to say this.. again. meh.
The recoloured sprite's shadng is faulty in multiple ways. First by being practically non-existant in both of them, especially the mudkip, and then the outlines don't look right, probably because they still have the blue tones in them they had before. You might wanna fix that, it really will annoy everybody who isn't partially colour blind. Also, you might wanna change the light green tone in the secon sprite, it doesn't really work for me.
As for the battler, they eyes don't fit. You should definitely look for other ones, it looks pretty deformed like thisif you ask me. Also, I don't know if this character is supposed to be femape or male, but while the battler looks a bit like a girl, the sprite doesn't, at all.
Also, what the fuck is up with the hands? They look far too big and deformed to fit the battler. Did you resize them? I see alot of faulty pixels there...
But seriouspy, I remember you claiming to be an artist. Shouldn't you see those flaws yourself? It's importand to see your own mistakes if you want to inprove. You should work on that.