Desert Underpass Emerald · Dungeon
The Desert Underpass is a long tunnel reached through the Fossil Maniac's house on Route 114. It is closed until you have entered the Hall of Fame. At the far end you find whichever fossil you did not take from Mirage Tower.
- Wild Pokémon
- 3
- Items
- 2
- Trainers
- 0
Connects to: Route 114
Desert Underpass on the Hoenn map
Wild Pokémon
| Pokémon | Type | Lv. | Chance |
|---|---|---|---|
 Ditto | Normal | 38–45 | 50% |
 Whismur | Normal | 35–38 | 34% |
 Loudred | Normal | 38–44 | 16% |
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 |
|---|---|
| Claw Fossil | Gift |
| Root Fossil | Gift |
Hidden items can be found with the Itemfinder.
Tips
- Ditto lives only here in Emerald, at a 50% encounter rate, which makes it ideal for breeding.
- Whismur (34%) and Loudred (16%) make up the rest of the wild encounters.
- Walk to the end of the tunnel to collect the Root Fossil or Claw Fossil you passed on at Mirage Tower.
- Take the fossil to Devon Corporation in Rustboro City to revive it at Lv20.
Walkthrough: Part 18: Post-game: Battle Frontier and Legendaries
FAQ
Where do you catch Ditto in Pokémon Emerald?
In the Desert Underpass, reached through the Fossil Maniac's house on Route 114 after the Hall of Fame.
How do you get the other fossil in Emerald?
After the Hall of Fame, go through the Fossil Maniac's house on Route 114 into the Desert Underpass; the fossil is at the end.
When does the Desert Underpass open?
It opens once you have entered the Hall of Fame.
What Pokémon can you catch in Desert Underpass in Emerald?
3 species: Ditto, Whismur, Loudred.
Sources & picture credits
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).