I designed this to learn basics of sculpt in fusion360 and I ended up with this: a diglett with a storage box inside! I used the "standard" model enviroment in fusion360 to make the body and I used the sculpt enviroment to model the ground.
The gap between parts is from 0.35mm to 0.5mm on each side, so it should work on almost every printer (I hope it! ).
I made two external bodies of the pokemon: one is completely hollow, the other has a flattened top on the inside to limit overhangs.
I hope you will enjoy!