This is my countryball I make base on PWA countryball. There already have modifier you can use for your animation for blender. Hope my support helpfull.
If you download but it is a old version (old version only contain eyes and 1 character `ball`) so download the v1.0.1 version (the update version with 2 hats and 3 character `ball, chile, cube`) - Link: sketchfab.com/3d-models/countryballers-support-blender-file-v101-7b36060764184e768d3431d112af44a2