The Underground is the best source of rare items in Sinnoh: evolution stones, Plates, fossils, Heart Scales, weather rocks. But a failed dig makes the wall collapse before you have cleared everything. Here is the method for succeeding at every dig, making your spheres pay off and finding the rarest fossils.
This feature complements our The Underground guide, which covers the basics: the Explorer Kit, traps and the Secret Base.
The key principle: every hit weakens the wall, and the solidity bar at the top of the touch screen decides everything. The art of digging is to clear as many items as possible with as few hits as possible.
