New Mauville Emerald · Dungeon
New Mauville is an underground power plant reached by Surfing from Route 110. After you beat Norman, Wattson waits outside Mauville City's Gym and gives you the Basement Key, asking you to switch off its overloading generator. Turning it off earns you TM24 Thunderbolt from Wattson.
- Wild Pokémon
- 4
- Items
- 5
- Trainers
- 0
- HMs
- Surf, Basement Key
Connects to: Route 110
New Mauville on the Hoenn map
Gift and special Pokémon
Voltorb Lv. 25 · One-off encounter ×3 · InsideLooks like an item ball until you touch it.
Wild Pokémon
Entrance
| Pokémon | Type | Lv. | Chance |
|---|---|---|---|
 Magnemite | ElectricSteel | 22–26 | 50% |
| Voltorb | Electric | 22–26 | 50% |
Inside
| Pokémon | Type | Lv. | Chance |
|---|---|---|---|
| Magnemite | ElectricSteel | 22–26 | 49% |
| Voltorb | Electric | 22–26 | 49% |
 Magneton | ElectricSteel | 26 | 1% |
 Electrode | Electric | 26 | 1% |
Chances are the game’s encounter slots (grass and caves 20/20/10/10/10/10/5/5/4/4/1/1, surfing, diving and Rock Smash 60/30/5/4/1, Old Rod 70/30, Good Rod 60/20/20, Super Rod 40/40/15/4/1). Emerald has no time-of-day encounters. Where to find every Pokémon.
Items
| Item | How |
|---|---|
| Ultra Ball | Item ball |
| Escape Rope | Item ball |
| Thunderstone | Item ball |
| Full Heal | Item ball |
| Parlyz Heal | Item ball |
Hidden items can be found with the Itemfinder.
Tips
- Catch Magnemite and Voltorb here (50% each at the entrance); New Mauville is the only place either appears in the wild.
- Three item balls inside are actually Lv25 Voltorb, so save before touching them if you want to catch one.
- Step on the coloured floor switches to open and close the barriers blocking the paths.
- Look out for rare Magneton and Electrode inside, each at 1%.
- Collect the Ultra Ball, Thunderstone, Escape Rope, Full Heal and Parlyz Heal on your way through.
Walkthrough: Part 9: Surfing the Western Seas and New Mauville
More maps
FAQ
How do you get into New Mauville in Pokémon Emerald?
Get the Basement Key from Wattson in Mauville City after you beat Norman, then Surf to the entrance on Route 110.
Where do you get TM24 Thunderbolt in Emerald?
Switch off the generator deep in New Mauville and talk to Wattson in Mauville City again.
Where can you catch Magnemite in Emerald?
Only in New Mauville, where it makes up about half of all encounters.
What Pokémon can you catch in New Mauville in Emerald?
4 species: Magnemite, Voltorb, Magneton, Electrode.
Sources & picture credits
- New Mauville (Bulbapedia)
- pret/pokeemerald (decompiled game data)
- Map: New_Mauville_outside_E.png
- Map: New_Mauville_entrance_E.png
- Map: New_Mauville_RSE.png
Guide text is original retrogameindex writing, checked against Bulbapedia and the game data. Wild Pokémon and encounter chances, items, trainers, rematch teams, gifts, trades and shops come from the pret/pokeemerald decompilation. Maps and sprites © Nintendo / Creatures / GAME FREAK, archived from the Bulbagarden Archives; the Hoenn map is drawn from the game’s own PokéNav map graphics (listed on the image gallery).