you touch the screen with your stiylist
go to key items find it and hit use save and your in underground
No you do not need wifi to go into the underground tunnles but you can use ds to ds action and play with your friends in the underground and trade and stuff.
first you have to go underground. they are sometimes pretty rare. when you get underground, use the touch screen to look for stuff(some in walls some in ground). the top screen should be showing gold dots on the underground map. go there. Not only underground. Go to where you can find clefairys. They are mostly in caves don't know which. Some and most likely of clefairys are holding moonstones to evolve itself.
in the underground tunnels.
Underground,use the explore kit to get there.
use your explorer kit
in Pokemon diamond you can only use it in battle since your cave/house/thing is underground
Underground use the Explorer Kit.
get an odd keystone underground. put it in the tower.do more stuff and you should be able to catch spiritomb.
you can't you have to get poliwhirl and then use a water stone on it [which is underground]
you touch the screen with your stiylist
It's called a DIGGER DRILL and you use it by pressing A on an underground wall.
go to key items find it and hit use save and your in underground
In the Pokemon diamond underground.
To get any stone in Dimand/Pearl you have to dig underground for it. You can also find some in caves and stuff like that i think.
no