From Bulbapedia, the community-driven Pokémon encyclopedia.
Jungle (Japanese: ジャングル Jungle) is a Friend Area in Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team that can be bought from the Wigglytuff Club for 800 Poké. It is the only Friend Area in the Jungle area, and has a capacity of thirteen Pokémon, all of which are Grass-type.
The Jungle is a lush, tropical rainforest with a swampy area near the back. There are also palm leaves and square, moss-covered rocks scattered around.
Deep in this overgrown tropical area live many Grass-type Pokémon. The swampy ground is rich in nutrients.