Pokémon Mansion FireRed & LeafGreen · Dungeon

Pokémon Mansion is the burned-out lab on Cinnabar Island, full of puzzle doors, statues and old research journals about Mewtwo. You explore it to find the Secret Key on B1F, which opens the Cinnabar Gym. You reach it after Surfing to Cinnabar or crossing Seafoam, and the wild Pokémon and trainers are around the low-to-mid 30s.
- Wild Pokémon
- 9
- Items
- 15
- Trainers
- 7
- Needs
- Surf (to reach Cinnabar Island)
Connects to: Cinnabar Island
Pokémon Mansion on the Kanto map
Wild Pokémon
1F, 2F, 3F
| Pokémon | Type | Lv. | FireRed | LeafGreen |
|---|---|---|---|---|
Raticate | Normal | 32–36 | 30% | 30% |
Grimer | Poison | 28–30 | 5% | 30% |
Koffing | Poison | 28–30 | 30% | 5% |
Rattata | Normal | 26–28 | 15% | 15% |
Vulpix | Fire | 30–32 | – | 15% |
Growlithe | Fire | 30–32 | 15% | – |
Muk | Poison | 32 | – | 5% |
Weezing | Poison | 32 | 5% | – |
B1 F
| Pokémon | Type | Lv. | FireRed | LeafGreen |
|---|---|---|---|---|
Raticate | Normal | 34–38 | 30% | 30% |
Grimer | Poison | 28–30 | 5% | 30% |
Koffing | Poison | 28–30 | 30% | 5% |
Ditto | Normal | 30 | 10% | 10% |
Vulpix | Fire | 30–32 | – | 15% |
Growlithe | Fire | 30–32 | 15% | – |
Rattata | Normal | 26 | 5% | 5% |
Muk | Poison | 34 | – | 5% |
Weezing | Poison | 34 | 5% | – |
Chances are the game’s encounter slots for each version (grass 20/20/10/10/10/10/5/5/4/4/1/1, surfing and Rock Smash 60/30/5/4/1, Old Rod 70/30, Good Rod 60/20/20, Super Rod 40/40/15/4/1). A dash means the Pokémon does not appear in that version here. Version exclusives · Where to find every Pokémon.
Trainers
| Trainer | Pokémon | Prize | Where |
|---|---|---|---|
ScientistTed | Electrode 29 Weezing 29 | ₽1,392 | 1F |
YoungsterJohnson | Ekans 33 Ekans 33 Raticate 34 | ₽544 | 1F |
BurglarArnie | Charmander 34 Charmeleon 34 | ₽2,992 | 2F |
BurglarSimon | Ninetales 38 | ₽3,344 | 3F |
ScientistBraydon | Magnemite 33 Magneton 33 Voltorb 33 | ₽1,584 | 3F |
BurglarLewis | Growlithe 34 Ponyta 34 | ₽2,992 | B1 F |
ScientistIvan | Magnemite 34 Electrode 34 | ₽1,632 | B1 F |
Prize money is four times the level of the trainer’s last Pokémon times the trainer class’s base rate (doubled in double battles). Use the VS Seeker to rematch trainers.
Items
| Item | How | Where |
|---|---|---|
| Carbos | Item ball | 1F |
| Escape Rope | Item ball | 1F |
| Protein | Item ball | 1F |
| Moon Stone | Hidden | 1F |
| Calcium | Item ball | 2F |
| Zinc | Item ball | 2F |
| HP Up | Item ball | 2F |
| Max Potion | Item ball | 3F |
| Iron | Item ball | 3F |
| Rare Candy | Hidden | 3F |
| TM22 SolarBeam | Item ball | B1 F |
| TM14 Blizzard | Item ball | B1 F |
| Full Restore | Item ball | B1 F |
| Secret Key | Item ball | B1 F |
| Elixir | Hidden | B1 F |
Hidden items sparkle with the Itemfinder.
Tips
- The Secret Key is an item ball on B1F; you must have it to enter the Cinnabar Gym.
- The gates are controlled by statue switches: pressing one flips the open and closed barriers, so toggle them to reach the next area.
- Version differences: FireRed has Growlithe and Weezing (and Koffing is far more common), while LeafGreen has Vulpix and Muk (and Grimer is far more common); Koffing and Grimer appear in both versions, and both have Ditto on B1F.
- Worth picking up are TM22 SolarBeam and TM14 Blizzard on B1F, a Full Restore on B1F, a Max Potion on 3F and hidden Rare Candy (3F) and Moon Stone (1F).
- Burglars and Scientists here use Fire, Electric and Poison types, so Water and Ground moves work well.
Walkthrough: Part 11: Cinnabar Island and Blaine
More maps
FAQ
Where is the Secret Key in Pokémon Mansion?
It is an item ball on B1F, and you need it to unlock the Cinnabar Gym.
How do the statue switches work in Pokémon Mansion?
Pressing one flips the barriers, opening some doors and closing others, so you use them to reach new areas.
Where can I catch Ditto in FireRed and LeafGreen?
On B1F of Pokémon Mansion in both versions; it is also common in Cerulean Cave after the story.
What Pokémon can you catch in Pokémon Mansion in FireRed and LeafGreen?
9 species: Raticate, Grimer, Koffing, Rattata, Vulpix, Growlithe, Muk, Weezing, Ditto. FireRed only: Growlithe, Weezing. LeafGreen only: Vulpix, Muk.
Sources & picture credits
- Pokémon Mansion (Bulbapedia)
- pret/pokefirered (decompiled game data)
- Map: Pokémon_Mansion_FRLG.png
- Map: Pokémon_Mansion_B1F_FRLG.png
- Map: Pokémon_Mansion_1F_FRLG.png
- Map: Pokémon_Mansion_2F_FRLG.png
- Map: Pokémon_Mansion_3F_FRLG.png
Guide text is original retrogameindex writing, checked against Bulbapedia and the game data. Wild Pokémon and encounter chances for both versions, items, trainers, gifts, trades and shops come from the pret/pokefirered decompilation (pret/pokefirered 037335f4c7). Maps and sprites © Nintendo / Creatures / GAME FREAK, archived from the Bulbagarden Archives; the region maps are drawn from the game’s own map graphics (listed on the image gallery).

























