you found them under ground in the walls then dig it up
well, there are tons of items, the main items are spheres (those let you buy things), fossils (you can go to oreburg and turn those fossils into other pokemon), and many many more.
Under Veilstone City is a small cave where a man is digging. In there you can find that pokémon. But I don't think it's very common, so you must be patient when you look for it.
go in the golden rod under ground tunnel
You dig for it under ground after you get the national pokedex and the are rare.
fossils are found under ground
dig under ground
go under ground and find fossils
you need to have the explore kit then you need to dig in the under ground.
you found them under ground in the walls then dig it up
Fossils are under ground at random points in the day or night.
i don't know but i think one of the regis are in there
well, there are tons of items, the main items are spheres (those let you buy things), fossils (you can go to oreburg and turn those fossils into other pokemon), and many many more.
well, i got my cranidos's under ground. when you are digging you might find skull fossils. take the fossils to a guy the oreberg museum. go outside then back in and the guy will give you a cranidos
in the ground near an under populated area
sand or under ground doesnt matter
spheres are like gems. when you bury them, they gradually grow to a bigger size. people you meet in the underground will trade you goods or traps if you have the kind of sphere they want. fossils are, well, fossils of prehistoric pokemon. after placing the fossils into the items pocket of your bag, head to the oreburg museum. a person behind the desk will revive them for you. (fyi the skull fossil is a cranidos. they are found only in diamond.)