The Pokémon Mansion (Japanese: ポケモン屋敷Pokémon Mansion) is a decrepit, burned-down mansion on Cinnabar Island. It got its name because a famous Pokémon researcher once lived there.
The Pokémon Mansion has four different floors. Doors can be unlocked in the mansion by pressing switches hidden in statues scattered around the building. In Generations I and III, there is a balcony on 3F with two possible points to jump down from, with the eastern one leading back to 2F and the western one leading to 1F and allowing the player to access B1F, while in Generation VII, the western balcony is the only possible way down, and it is utilized by climbing down a ladder instead of jumping. In Generation VII only, there are beds at the basement, which the player can rest in, fully healing their entire party. In Generations I and III, there is an exit at the southeast corner of 1F, which transports the player back to the front door of the mansion, while in Generation VII, it is replaced by a one-way warp panel that serves the same purpose.
Amongst the rubble and wreckage are journal entries written by the scientist who obtained a Mew and cloned it to create Mewtwo. In Generation VII, there are also multiple glass containers likely used during said cloning process at the basement, the largest one of which shows signs of having been beaten on over and over from the inside.
The Pokémon Mansion, along with every other building on Cinnabar Island, is destroyed in the eruption of the Cinnabar Island volcano prior to the events of Generations II and IV, and as such, it no longer exists.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
Red was seen visiting the Pokémon Mansion in File 3: Giovanni. The mansion used to be full of different kinds of Pokémon, but was now just an old, abandoned house. While exploring the mansion, Red found a journal describing the discovery of a new species of Pokémon.
The Pokémon Mansion was also referenced in File 4: Charizard, where Red recalled reading the entries in the journal, leading to him identifying the Pokémon Blue had recently fought against and lost to as Mewtwo, possibly created in the very same mansion Red visited and found the journal from.
In Pokémon Adventures, instead of being burned-down and deserted, the Pokémon Mansion appears to be well-kept and habitable. It made a brief appearance in Holy Moltres, where multiple Team Rocket Grunts were seen raiding the building, searching for clues of Blaine's whereabouts in order to find and punish him for leaving Team Rocket.
In Generation VII, a cloning laboratory is added to the west side of the basement. If the player brings a Mew or Mewtwo along as the walking Pokémon to the laboratory, it will stop next to the largest glass container and stare quietly at it.
Additionally, the room just south of the large glass container holds four smaller cloning tanks, possibly alluding to Mewtwo's companions from The Uncut Story of Mewtwo's Origin.
In Generation I, it is possible to get stuck on 3F. This happens if the player stands on the east side of the table in the southwestern room and the Burglar with a Ninetales then challenges them to a battle. After the battle, the player will be stuck in a corner, the Burglar blocking the way. If the player saves after this and doesn't have an Escape Rope or a Pokémon with Dig, the only way to escape is to black out by fighting wild Pokémon. The layout was changed in FireRed and LeafGreen, and it is no longer possible to get trapped.
