Underground mining
Your first badge can open a second world beneath the routes. Get an Explorer Kit from the Hiker in your first gym town, then use it from an eligible outdoor tile. Use the kit again in the tunnels to return to the surface.
Where to get the Explorer Kit
| Region | Badge | Hiker’s house |
|---|---|---|
| Kanto | Boulder · Brock | Pewter City, House 2. Look for an old man and a boy who give battle tips. |
| Johto | Zephyr · Falkner | Violet City, northwest house. |
| Hoenn | Stone · Roxanne | Rustboro City, House 2. The residents talk about the Trainer’s School. |
| Sinnoh | Coal · Roark | Oreburgh City, south house with the mine worker. |
Finding a wall
Open the Underground map and use Scan. A sweep checks up to 80 tiles in each direction and can reveal up to eight new spots. Follow a sparkle to the wall, stand beside it in the corridor, and interact. The spots grow in clusters, so scan again after a dig. If nothing is close, follow the direction the radar gives you.
How much can I dig?
Each wall has 13 columns, 10 rows and 196 integrity. Your first wall contains three treasures and no obstructing rocks. Later walls roll two to four buried finds, with rocks mixed in.
| Tool | Cost per hit | Use it for |
|---|---|---|
| Pickaxe | 4 integrity | Careful work around a visible edge. It removes two layers at the center and one from the four adjacent squares. |
| Hammer | 8 integrity | Searching a fresh patch. It removes two layers at the center and along the four sides, plus one on each diagonal. |
Exposing one corner lets you see what you’re digging toward. Uncover the whole shape to earn it. A collapse pays out fully uncovered finds. Walking away early forfeits the dig. A hit on exposed rock still costs integrity and stops the tool’s spread.
What can I find?
Colored spheres pay for decorations and traps. Treasure includes fossils, evolution stones, Plates, the Odd Keystone and Old Amber. The beta uses the expanded treasure pool from your first dig. Your character’s ID determines which of the Skull or Armor fossils can roll. Fossil weights also vary by item, so total finds per wall won’t tell you your odds of getting a particular fossil.