Yoshi's Island Tribute

From what I can see most of my issues lie with Baby Mario, the hat does not exactly seem right, it looks slightly out of place compared to the rest of the picture, it needs a bit more shading.
Mario's eyebrow sticks out and can be sen above the hat rather than behind it. His arms have very little detail and look unnatural, Yoshi's arm could be shown a bit more... his legs look line though. Additional detail showing arm and leg joints would be helpful.

I don't mind if baby Mario has no mouth, but the lack of expression is slightly odd.

No real issues and i'd rather keep baby Mario mouthless, my only real issues are the arms, legs and hat of him... not by much though