The design is based on the PokeBall from Pokemon, owned by Game Freak, Nintendo, and the Pokemon Company and anyone else I forgot :D I honestly have no idea how this will print I attempted to keep the design loyal to how the ball opens in the anime. I have yet to test it because I do not own a 3D printer myself, but if you do print it please let me know how to improve on the design! :)
In addition to the print files you will need a small spring activate the button.
To build the hinge you will need to cut a small piece of 1.75 mm filament and sit it in between the hinge caps and the bottom inner piece.
The button works by sliding the inner button into the outer button into the belt, then attaching the "TT" shaped mount behind the button to the belt with a spring in between the button and mount.