Super Smash Bros. Ultimate Ripping Project

[Inconnu_nom]

Question from an absolute dummy.
I have a 3d printer and I'm wanting to print a version of Popo swinging his hammer down in some way. What is the easiest way do to this in blender?
(Ultimately, I can print using an IGS, STL, or OBJ file which Blender can export. Any help you can give to point me how to import or if someone has a noob friendly textureless model I can stumble through adjusting the pose in some way would be appreciated.)

Figured out how to open the blender files from the Git. Do I need to add bones to the models manually? Not sure how to pose the model...