Mt. Horn is the 7th dungeon in Pokemon Mystery Dungeon Explorers of Time, Darkness and Sky. It is unlocked after clearing Craggy Coast. If the protagonist chooses to go to Rock Path before this dungeon, it will bring the total number of floors to 19. The objective of the dungeon is to clear it and reach the expedition camp with Bidoof. This place is also the first dungeon to have boxes dropped from fainted foes. To open these boexs, the protagonist must go to Xatu's Appraisal in Treasure Town. He will open the boxes for a fee of 150 Poké.