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The Grand Underground Map is divided into six Zones and consists of several Hideaways of Caves and Caverns that can be found all over the Sinnoh region. Read on to learn about the different Zones with all Hideaways underground, all items that can be found, and the locations of Sphere Traders and Rest NPCs on each Zone.
List of Contents
| Grand Underground Zones | |
|---|---|
| Eastern and Western Zone | Central Zone |
| Southeastern Zone | Southwestern Zone |
| Northwestern Zone | Northeastern Zone |
| Map Location | Available Items |
|---|---|
  |
・A: Big Mushroom ・B: Bullet Seed (TM09) ・C: Rare Candy ・D: Big Mushroom ・E: Swagger (TM87) ・F: Calm Mind (TM04) ・G: Sandstorm (TM37) ・H: Nugget ・I: Charcoal ・J: Shock Wave (TM34) |
| Available Hideaways | City / Route |
 Still-Water Cavern (Big)  Big Bluff Cavern (Big) |
・Eterna City ・Hearthome City ・Veilstone City ・Routes connected to above |
| Icons Legend | |
|---|---|
 | Small Sphere Trader |
 | Rest NPC |
| Map Location | Available Items |
|---|---|
 |
・A: Deep Sea Scale ・B: Dragon Pulse (TM59) ・C: Nugget |
| Available Hideaways | City / Route |
 Stargleam Cavern (Big) |
Celestic Town |
| Icons Legend | |
|---|---|
| Small Sphere Trader |
| Rest NPC |
| Map Location | Available Items |
|---|---|
 |
・A: Dusk Stone ・B: Giga Drain (TM19) ・C: PP Max ・D: Rock Tomb (TM39) ・E: Dragon Fang |
| Available Hideaways | City / Route |
 Bogsunk Cavern (Big) |
Sunyshore City |
| Icons Legend | |
|---|---|
 | Large Sphere Trader |
 | Treasure Trader |
| Rest NPC |
| Map Location | Available Items |
|---|---|
 |
・A: Deep Sea Tooth ・B: Bug Buzz (TM62) ・C: Focus Punch (TM01) ・D: Toxic (TM06) ・E: X-Scissor (TM81) ・F: PP Up ・G: Rare Candy |
| Available Hideaways | City / Route |
 Sunlit Cavern (Big) |
・Twinleaf Town ・Jubilife City ・Canalave City ・Routes connected to above |
| Icons Legend | |
|---|---|
| Large Sphere Trader |
| Small Sphere Trader |
| Treasure Trader |
| Rest NPC |
| Map Location | Available Items |
|---|---|
 |
・A: Lucky Egg ・B: Attract (TM45) ・C: Leftovers ・D: Rock Slide (TM80) ・E: Sharp Beak ・F: Dawn Stone |
| Available Hideaways | City / Route |
 Glacial Cavern (Big) |
・Snowpoint City and Connected Routes ・Fullmoon Island |
| Icons Legend | |
|---|---|
| Large Sphere Trader |
| Treasure Trader |
| Rest NPC |
| Map Location | Available Items |
|---|---|
 |
・A: Overheat (TM50) ・B: Stone Edge (TM71) ・C: Twisted Spoon ・D: Shiny Stone ・E: Scald (TM49) |
| Available Hideaways | City / Route |
 Typhlo Cavern (Big) |
・Fight Area ・Survival Area ・Resort Area ・Stark Mountain ・Routes connected to above |
| Icons Legend | |
|---|---|
| Large Sphere Trader |
| Small Sphere Trader |
| Treasure Trader |
| Rest NPC |
| Grand Underground Maps & Data | |
|---|---|
| All Underground Pokemon | Grand Underground Map: Items & NPC Locations |
| Grand Underground Guides | |
| Pokemon Hideaways | Underground Man Missions |
| List of Statues and Effects | How to Get Shiny Statues |
| Digging for Treasure | All Treasures and Appearance Rates |
| How to Make a Secret Base | How to Find Diglett |
| Sphere Trader Locations | List of Spheres |
| List of Pedestals | |
| Removed Features | |
| Capture the Flag | Traps |
| Decorations | |
| Hideaways and List of Pokemon | ||
|---|---|---|
 Fountainspring Cave  |
 Stargleam Cavern(Various types) |
 Dazzling Cave(Various types) |
 Grassland Cave |
 Spacious Cave(Various types) |
 Big Bluff Cavern  |
 Riverbank Cave(Various types) |
 Volcanic Cave |
 Sandsear Cave |
 Rocky Cave |
 Bogsunk Cavern |
 Still-Water Cavern |
 Whiteout Cave |
 Icy Cave |
 Glacial Cavern |
 Swampy Cave |
 Typhlo Cavern |
 Sunlit Cavern(Various types) |
Where is splunkers? I got told to head into the underground and speak to him
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Spacious Cave
Volcanic Cave
Fountainspring Cave
Whiteout Cave
Icy Cave
Riverbank Cave
Sandsear Cave
Grassland Cave
Rocky Cave
Swampy Cave
Dazzling Cave
Stargleam Cavern
Still-Water Cavern
Typhlo Cavern
Sunlit Cavern
Big Bluff Cavern
Bogsunk Cavern
Glacial Cavern
Spacious Cave
Fountainspring Cave
Riverbank Cave
Volcanic Cave
Sandsear Cave
Swampy Cave
Whiteout Cave
Found a bottle of PP Up in the same location as Sandstorm