Magma Cavern (Japanese: マグマの ちてい,Magma Depths) is the fifteenth dungeon in Red Rescue Team and Blue Rescue Team. After floor 20, the player is given an option to save and heal before continuing on to Magma Cavern Pit, which takes place on the outside of the mountain. It has three floors, with the fourth legendary Pokémon boss, Groudon, at the peak. There is a chance of finding a Monster House on floors 9-20, or a Kecleon Shop on floors 2-6. There is no chance of finding a buried item in this dungeon. The entire dungeon is dark.
Spoiler warning: Plot and/or ending details may follow.