A Monster House in Cryptic Chasm
Monster Houses, called "MH" for short by players, are special floors that appear at random in most dungeons (barring many in Exbel as they are typically beginner dungeons). Monster Houses are characterized by being one medium-sized room with 20 Pokémon that will usually be encountered on that floor, still spawning in more as normal. Pokémon defeated in a Monster House will yield 1.5x the normal amount of experience.
When encountering a Monster House, a text box saying "It's a Monster House!" appears before any action can be made. Monster Houses can only appear in randomly generated dungeons, on Floor 6 and up. The stairs will always spawn in the bottom-right corner of a Monster House. Traps, Secret Rooms, and tiles such as water will never show up in them, and items in the dungeon that can or will spawn on tiles other than the ground will always be on the ground.
Monster Houses are the only way to obtain Zorua. The move Sweet Scent must be used, with a chance of spawning a Zorua each time. Zorua can not spawn with the use of 
Honey. Due to Illusion, Zorua will appear as a random Pokémon on the floor if there are any, otherwise it will appear as a Zorua. Zorua always has the moves Sludge Bomb, Punishment, Sucker Punch and Nasty Plot, based on the four event moves Zoroark could obtain in Generation 6[1].
Trivia[]
- Zorua is the only Pokémon that can be encountered solely through Monster Houses.