I want to be able to reuse the animations I have for one character on another. If I try to reuse the animator controller it says the child objects are incorrect (yellow font) if I use the same child objects in effects the original as well. Any help would be appreciated.
I just had the same problem and found the solution. You have to create an empty state in the animator, where you want to reuse the animation (see screenshot).
After that, click on the animation, and you will find a field in the inspector called motion. There you can choose the animation you need.