Kanto field journalPokémon FireRed / LeafGreenGUIDES

Pokémon Mansion FireRed & LeafGreen · Dungeon

Map of Pokémon Mansion in Pokémon FireRed and LeafGreen
Pokémon Mansion (in-game map)

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

Where Pokémon Mansion is on the Kanto mapPokémon Mansion on the Kanto map

Wild Pokémon

1F, 2F, 3F

Tall grass encounter rate 7
PokémonTypeLv.FireRedLeafGreen
RaticateNormal32–3630%30%
GrimerPoison28–305%30%
KoffingPoison28–3030%5%
RattataNormal26–2815%15%
VulpixFire30–32–15%
GrowlitheFire30–3215%–
MukPoison32–5%
WeezingPoison325%–

B1 F

Tall grass encounter rate 5
PokémonTypeLv.FireRedLeafGreen
RaticateNormal34–3830%30%
GrimerPoison28–305%30%
KoffingPoison28–3030%5%
DittoNormal3010%10%
VulpixFire30–32–15%
GrowlitheFire30–3215%–
RattataNormal265%5%
MukPoison34–5%
WeezingPoison345%–

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

TrainerPokémonPrizeWhere
ScientistTedElectrodeElectrode 29WeezingWeezing 29₽1,3921F
YoungsterJohnsonEkansEkans 33EkansEkans 33RaticateRaticate 34₽5441F
BurglarArnieCharmanderCharmander 34CharmeleonCharmeleon 34₽2,9922F
BurglarSimonNinetalesNinetales 38₽3,3443F
ScientistBraydonMagnemiteMagnemite 33MagnetonMagneton 33VoltorbVoltorb 33₽1,5843F
BurglarLewisGrowlitheGrowlithe 34PonytaPonyta 34₽2,992B1 F
ScientistIvanMagnemiteMagnemite 34ElectrodeElectrode 34₽1,632B1 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

ItemHowWhere
CarbosItem ball1F
Escape RopeItem ball1F
ProteinItem ball1F
Moon StoneHidden1F
CalciumItem ball2F
ZincItem ball2F
HP UpItem ball2F
Max PotionItem ball3F
IronItem ball3F
Rare CandyHidden3F
TM22 SolarBeamItem ballB1 F
TM14 BlizzardItem ballB1 F
Full RestoreItem ballB1 F
Secret KeyItem ballB1 F
ElixirHiddenB1 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

Pokémon Mansion: Pokémon Mansion B1F
Pokémon Mansion B1F
Pokémon Mansion: Pokémon Mansion 1F
Pokémon Mansion 1F
Pokémon Mansion: Pokémon Mansion 2F
Pokémon Mansion 2F
Pokémon Mansion: Pokémon Mansion 3F
Pokémon Mansion 3F

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

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).