A Luminous Orb is an item in the Pokémon Mystery Dungeon series that reveals the layout of the entire floor of a dungeon.

Locations in Explorers of Time, Darkness, & Sky

Luminous Orbs appear on all floors of Waterfall Cave, Apple Woods, Side Path, Craggy Coast, Mt. Horn, Foggy Forest, Steam Cave, Amp Plains, Northern Desert, Quicksand Cave, Crystal Cave, Crystal Crossing, Chasm Cave, Dark Hill, Sealed Ruin, Dusk Forest, Treeshroud Forest, Brine Cave, Hidden Land, Temporal Tower, Mystifying Forest, Sky Peak, & Spacial Rift

• Mt. Bristle (1F-4F)
• Star Cave (all floors & any shop)
• Marine Resort (all shops)
• Concealed Ruins (all shops)
• Mystery Jungle (all shops)
• Oblivion Forest (all floors & any shops)