How old is you bird?
Do you have a Standard of Perfection book? Have you researched the SOP for Wyandotte?
Look at the CSU thread. Wyandotte were covered in that thread .
Your cockerel/rooster should have a rounder chest and his tail should be held a little higher. His wing set is a little low...should be more tight to his body and not pointing down. It is hard to tell from the photos how broad his back is and how wide his tail is set.
His legs have good color and texture. His comb follows the contour of his head.
Would like to see a picture of his wing spread out so we can see the color contrast on his primary and secondary feathers.