Sinnoh Underground

Sinnoh Underground

the Sinnoh underground is a huge network of tunnels that run underneath the region of Sinnoh. Once you reach Eterna city and obtain the explorer kit item from the Underground Man, you can enter this huge area. He sets you different challenges to complete in the underground. These go from digging for spheres, to making your own secret base and decorating it.

Spheres are the currency of the Underground. Spheres can buy you anything from traps, treasure and even items to decorate your secret base. if you bury spheres in front of you and leave them there after a while they grow larger. if you bury a lot of spheres of the same colour in front of you and then dig it up a larger sphere is obtained.