From Bulbapedia, the community-driven Pokémon encyclopedia.
Ravaged Field (Japanese: あれただいち Ravaged Ground) is a Friend Area in the game Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team. It is in the Plains area, and has a capacity of only five Pokémon. It can be bought from Wigglytuff for 1,000 Poké.
Ravaged Field, like the name suggest, is a ravaged, barren wasteland with a desert-like appearance surrounded by ravaged grass and rocky hills.
A harsh and forbidding place of utter desolation. Even here, there exist hardy Pokémon.