

To access them, you need to get a Drill from the old man in Eterna City. Placed within the Underground world in Sinnoh, you can decorate them like in Ruby & Sapphire.

However, be careful as some of the items you find you will only get once such as the Arceus plates. There is another way to get Spheres however, in the far corners of the underground, there are traders that will give you large amounts of gems (in quantities of over 70) in exchange for items you have found. Below is a table that states the amounts that are given for the Spheres of particular sizes: You will get the original drop amount plus the extra amounts. What you do is drop the highest amount you have on the ground and keep dropping each subsequent piece onto the ground and then pick it up. However, when you keep getting them, they are not combined and there is only way to combine them and that does cause a loss in the Spheres. There are 5 different kinds of Spheres found in the underground Reds, Blues, Greens, Prisms & Pales. The other thing you will find is the currency of the Underground Spheres. However unlike in past games, you can have any number of these fossils on you so you can go revive 20 Omanytes or Anoriths if you do so wish. Also you can get the Armor Fossil & Skull Fossil depending on your version at any time.

You can also find all of the fossils here after you get the National Dex Dome Fossil, Helix Fossil, Old Amber, Claw Fossil & Root Fossil. There are a number of items that are found here including all the evolution stones, shards that are used to trade for evolution stones, the different plates used for Arceus and various items such as Revives and Hard Stones To make things worse, there a good number of rocks that are just there to take up space that can cause a cave in if you keep hitting them However there is a limit on how much stress you can induce on the wall through this before the wall collapses itself. It gives you a Pick Axe and a Hammer to use to try and break through the rocks in order to find 2 to 4 items. After locating them, this is controlled purely with the touch screen. The main thing that you do in the Sinnoh Underground is Excavating in the walls for various items. The Sinnoh Underground is also vital if you wish to get the Pokémon, Spiritomb Just go up to it and you will activate it To activate the many events including obstacles and Fossil Hunting, all you have to do is follow the shines on the Map on the Top Screen and when you're close to one, just press the Touch Screen and if there are any by you then you will see a Shining Diamond.
