Bogsunk Cavern

42 Pokémon can be caught at Bogsunk Cavern in Sinnoh.

Bogsunk Cavern is a swampy hideaway within Sinnoh's Grand Underground, opened up after the player obtains the Explorer Kit from the Underground Man in Eterna City. Its Pokémon roam freely across the cave floor instead of lurking in grass. Moss and dense vegetation cover this wetland-like cavern, which holds a lake where players can Surf to reach Pokémon visible in the water, weaving around rocks and plants that tower overhead.