Importing Animations from Mixamo
https://www.mixamo.com/#/?page=1&type=Character
Mixamo Allows you to download or import your own characters and give them animations that you can download. For instance you can upload a 3D model, and use the auto rigger to choose the location of the bones and give your characters animation without having to animate.
Downloading a Character
1. Go to mixamo main page and select a character to download, do not select or add any animations, when you select animations it will store them in the fbx file and I don't know how to remove selected animations other than refreshing the page.