Mickey never really learned the command "Fetch" he just knows that when I throw a ball he has to get it and bring it back. To do that, I got him in a sit stay and took his favorite toy. I threw it across the hall and told him to get it. Then I give the command "Come". When he gets to me I praised a lot and repeated. After a bit of practice, he learned it fairly quickly.

If you like you can give the command "Fetch" when he reaches the puppet. Good luck