Yes. If the “char name” of the models and animations are all the same, such that you can run “pview model1.egg animation2.egg” or “pview model2.egg animation2.egg” or “pview model1.egg animation1.egg” or “pview model2.egg animation1.egg” and all of them work in pview, then egg-optchar will recognize them all as the same skeleton, and convert them all at the same time, if you put all four egg files on the egg-optchar command line.