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 ground look for it. it well eventually appear
You have to talk to 36 people under ground using the explorer kit and then go to Pokemon tower and there will be a little alter south of there and use the odd key stone on it and you'll battle it.
You can only get them in Pokemon Diomond. If you have diamond you go under ground and get a fossil and bring the fossil to the oranburg museam. Then talk to the guy behind the desk. then you go outside then come back in and talk to him again and it will be a Pokemon.
Sypher is under the rock of doom. You know it.
by going to a piece of land like grass and clicking it. After wards you'll be under ground go to the shiny diamonds that you see above the screen and youll be getting gems which can buy you stuff for your club house which you make under ground
go under ground and find fossils
You have to dig it out under ground and you only get it in Pokemon pearl.
You can go under ground
fossils are found under ground
no you can only use the bike above ground
you have to go under ground and dig it up
under ground by diggin
you cant get a cranidos in pearl unless you trade it from diamond
it is the old amber, look under ground.
you cant its only on diamond,pearl and platinum
yes you can by going to the under ground and mining
under ground look for it. it well eventually appear