First, you need an explorer kit. Then, you need to keep doing the lessons the underground expert tells you to do in Eterna City.
on all the way to the right of eterna city, there is a house. go inside and an old fart should be there. if not, try a different house. the old dude will give you an Explorer Kit. go outside, use it, and voila! ur underground. tap the touch screen and sparklies should appear on the top screen. if a sparkly appears on the bottom, go to that wall and hit A. tap the hammer and start looking. light brown=1 tap. gray=2. rock=3.
When you get to Eterna City go to the "diggers"house and he would give you a digging kit. After you have got it, it will be in your key items. If you use it you will need to save first. You can meet friends in the tunnels, find and grow spheres, excavate fossils and get items from digging.
You have to talk to the old man in the house next to the Pokemon center (PC) in Eterna City. The sign next to his door says 'Underground Man's House Goin' Down For Adventure' He gives you the "explorer kit" which will appear in your key items pocket of your bag. When you press that, you will go down underground and be able to build a secret base. He asks you to do things which help you along your way! Hope this helps, and I figured this out on my own, so you had better be thankful that I saw your question and decided to answer it! Pokemon diamond version for sure!
Well. First you open your mini menu with your bag,pokemon,pokedex e.t.c. And tthen you go to your key items and go to explorer kit and go on use(you can only do all this after Beating a certain gym boss)
Go to Eterna City find a house with an old man and two other people in it . Talk to the old man he will give you the explorer kit which can be used to access the sinnoh underground.
Get the underground thing set at eterna in the house near the Pokemon center.then go to your bag and go to key items.you need to save the game when you use it.
use your pen and tap the touch screen.if gold dimonds appear press A on them and you will find treasure
u use your stylist and tap to look for something glowing and when u do u hit a right next to it!
you don't
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!
There are 2 places. If you go to Oreburgh city (first time going), you will go to an underground mine. And in Eterna City ( the next city after Oreburgh), in 1 of the buildings there is someone called underground man. he will give you an explorers kit. which has a shovel to dig underground
The only way I know of to get a sky plate in diamond/pearl, is to dig in the underground. it's a pretty rare item there, but i do not believe there is any other way.
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
Go underground by using your toolkit, then keep digging for treasure until you get lucky
Dig it out in the underground.
Dig Underground
its underground. you can dig it up.
You have to dig underground.
Dig underground and it should be there
Go underground and dig.
you can dig 1 out of the walls underground
YOu can dig underground for it but its rare.
dig in the underground and you can get them of wild geodude and graveler
You gotta dig it up (underground.)
If you're referring to going underground. You cant.