The Bogsunk Cavern (Japanese: 底なし沼の大空洞 Great Bottomless Marsh Hollow) is a type of hideaway seen in the Grand Underground. It can only be accessed after the player obtains the Explorer Kit in Eterna City from the Underground Man, and features Pokémon that roam the cave freely, instead of being found in tall grass.
Geography
Bogsunk Cavern is a large, bog-like, moss covered cavern with heavy flora, containing a lake. The water can be Surfed on to encounter Pokémon visible in the water. Some rocks and plants are taller than the player, and must be navigated around.
Items
Pokémon
With each additional badge earned by the player, the levels of wild Pokémon are increased.
| Progression
|
Level Ranges
|
| 1 Badge |
16-20
|
| 2 Badges |
25-29
|
| 3 Badges |
29-33
|
| 4 Badges |
33-37
|
| 5 Badges |
36-40
|
| 6 Badges |
39-43
|
| 7 Badges |
42-46
|
| 8 Badges |
50-55
|
| Elite Four defeated
|
58-63
|
After the player fulfills a particular objective during their adventure, another group of Pokémon are added to the pool of possible encounters. The spawn rates for certain types are influenced by the active "Statue Effect" applied by a player's Secret Base Statues.
Rare Spawns
Rare Spawns run concurrently to the existing encounter table, and use independent percentages for their rates.
| Pokémon
|
Games
|
Location
|
Levels
|
Rate
|
|
|
|
|
|
BD
|
SP
|
|
16-63
|
40%
|
|
|
BD
|
SP
|
|
16-63
|
50%
|
|
|
BD
|
SP
|
|
16-63
|
20%
|
|
|
BD
|
SP
|
|
16-63
|
40%
|
|
|
BD
|
SP
|
|
16-63
|
50%
|
| A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
|
In other languages
| Language
|
Title
|
| Chinese
|
Cantonese
|
無底沼澤大空洞 Mòuhdái Jíujaahk Daaihhūngduhng
|
| Mandarin
|
無底沼澤大空洞 / 无底沼泽大空洞 Wúdǐ Zhǎozé Dàkōngdòng
|
| French
|
Caverne du Marais Sans Fond
|
| German
|
Sickersumpfgrotte
|
| Italian
|
Caverna della palude
|
| Korean
|
끝없는 늪 대공동 Kkeudeomneun Neup Daegongdong
|
| Spanish
|
Caverna Insondable
|
|
|
|
|
This article is part of Project Locations, a Bulbapedia project that aims to write comprehensive articles on every location in the Pokémon world.
|
Dazzling Cave • 
Fountainspring Cave • 
Grassland Cave • 
Icy Cave • 
Riverbank Cave • 
Rocky Cave
Sandsear Cave • 
Spacious Cave • 
Swampy Cave • 
Volcanic Cave • 
Whiteout Cave
Big Bluff Cavern • 
• 
Glacial Cavern • 
Stargleam Cavern
Still-Water Cavern • 
Sunlit Cavern • 
Typhlo Cavern
