Yes the question plaguing the minds of Pokemon trainers for years, post descriptions or better yet drawing of what you thing the hidden part of Diglett might look like.
Here is my concept...
I imagine Diglett has two clawed feet which it uses to dig through the ground, it would need something, the ground is to hard to just push through.
Here is my concept...

I imagine Diglett has two clawed feet which it uses to dig through the ground, it would need something, the ground is to hard to just push through.