The Marsh is a location on the Friend Area Map in Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team. There are (?) Friend Areas at this location, housing a maximum total of (?) Pokémon.
- A peanut-shaped swamp with green, soupy water. It is home to Pokémon categories like Mud Fish, Whiskers, and Water Fish.
Peanut Swamp can be purchased from the Wigglytuff Club for 2,500 poké.
- A horrid swamp that spews toxic gases. It is literally a utopia for Poison-type Pokémon.
Poison Swamp can be purchased from the Wigglytuff Club for 8,500 poké after the main story has been finished.