I would argue that this one is the best one so far, largely in part that his face and expression look a lot better compared to your Ducky. Your lines also look a lot straighter this time around. Ducky's legs and back looked very "lumpy" whereas Chomper looks a lot smoother.
You mention his hands and while I'll say that his left hand looks pretty good, his right hand's fingers and thumb are a lot bigger and sort of meld together. Fret not though, hands are hard to draw and take some practice getting use to.
For his right leg it looks like it has an
enlarged knee. Actually I'm looking at the official artwork that this is based on and his knee does seem to be about that big but I did notice something else that I hope I can explain. Since his right leg is in the distance his right foot should appear to be above his left foot which you've done. That should also mean if he is standing still his right knee should also appear higher then his left, which is not the case (if you look at your Ducky drawing it is done correctly). This can give the appearance that Chomper is lifting his left leg. A good basic guide is that a line drawn from the toes of both feet should have approximately the same length and be parallel to a line drawn from both knees. By in large this is a pretty small detail and doesn't throw things off too bad however.
Another thing is that it looks like his back doesn't stick out as much as it should. I know that the official artwork does this as well but there's something about it that looks off. Maybe if the shoulder area wasn't as high and the part above his thigh a bit higher to make the curve not as pronounced might help.
I hope I'm not being Chomper biased, but I like this one the best so far and I feel like it's an overall improvement to your other drawings. Keep it up!
