If you are not the best animator or you are the best at it refrences can be awesome and helpful.  We talked about using 3d as a reference but you can use an actual person as well.

Here are some videos talking about animating using references and still drawing as well.

 

 

I think there are ways around it by using 3d or CG type stuff but personally to do these awesome 2d things I think you need some skill in drawing.  You be the judge.