You may have a glitch or you didn't find the guy who gives you the explores kit. If it's a glitch, TOO BAD! If you don't talk to the people, TALK TO THEM! It helps all the way though the game!
You can get a blue, green, red, pale, and prism orb underground.
its the rarest thing in the underground also it behind the Pokemon statue in Eterna City
Dig Dig Dig, until you find one. im not sure exactly, i think i went underground in Eterna City
go to eterna city then go to the house next to the Pokemon center then talk to the oldest man then he will give you an underground kit then go under ground and start digging in the walls until you find one.
You cant buy any fire stones in pearl or diamond but you can find them underground by digging into walls. They are easer to dig up after you get the national-dex. Hope i helped!
Dig does not work on Routes. It only works in caves.
Sadly you cant. You need to dig them up underground.
If you're referring to going underground. You cant.
You can find fossils in the Underground Tunnels, or underground. Just dig for them as you would spheres.
you cant unless someone from diamond trades you a Pokemon holding one or if they give you a cranidos. or you can dig underground for a skull fossil
Dig Underground
Dig for them in the Underground.
you can dig it up underground
Dig it out in the underground.
go underground
There are a few Pokemon that live underground such as Diglett and Dugtrio. Also, the move Dig allows Pokemon to burrow underground to attack their opponents.
If you dig underground and dig in the walls you can get heart scales.