The floors are ranked E, S and ★1, for the purpose of Treasure Boxes and Friend Rescues.
Being the first future dungeon, Chasm Cave introduces certain new mechanics. It is first dungeon to focus on non-standard dungeon layouts (with only Apple Woods and Marowak Dojo using them sporadically beforehand). Floors 1, 4 and 7 will always have five rooms in a horizontal line, while other floors will generate 10 rooms on the edge, with connecting hallways in the center. There are 2-3 starting enemies in the first half of the dungeon, and 2-4 in the second half. Each floor has 1-4 items on the floor.
The IQ Booster activates on every even floor. The turn limit is 1000. The enemies in this dungeon have 26IQ, granting them the Status Checker IQ skill. There is light darkness in this dungeon. Chasm Cave is the only dungeon in Explorers of Time, Darkness and Sky to lack walls, making the One-Room Orb unusable and allowing Magnemite, Magneton, Drifloon, and Drifblim to travel completely unrestricted.
