When you get the explorer kit from the old man in Eterna city (the house beside the pokemon center) use it and go underground. On your upper DS screen there are yellow glowing dots flashing on and off. Go up to one on the upper screen and look at the bottom screen. Click on your bottom screen to search for the glowing dot. When you find a glowing dot (only in walls) go up to it and click A. Then you will be in the digging screen, And use the hammer or pick axe. When you dig you will see 4 layers:

A rock

A dark brown spot

A lighter brown spot

the wall (which is un brake-able)

when you see a light brown layer with a crack in it, look carefully through that crack. If it has a white spot ignore it (wall). If the spot has a different color click the spot because something is hidden there.

Submitted by Evlazoi/Mark [DIGGERS] (josephderose6)