Red & Blue Mt. Moon

A sprawling cave crawling with Zubat and Geodude, where you fend off Team Rocket and keep either the Dome or Helix Fossil.

Mt. Moon is in Kanto. In the story you arrive from Route 3 to the west and continue east to Route 4.

MT. MOON MAP

The way down forks constantly, side passages peeling off the main path before it bottoms out two basements deep and exits toward Cerulean City. Most of the detours lead somewhere; the straight line just leaves.

Red & Blue

Mt. Moon Walkthrough

12 trainers 4 in the steps 8 items 8 species

1F

7 TRAINERS · NONE IN THE STEPS · 3 ITEMS · 4 SPECIES
1
Three ladders lead down from this floor of Mt. Moon, but only the northwest one carries you toward the exit, while the other two end in walled-off pockets.
  1. Head west from the entrance to take TM12 Water GunTMTM12 Water GunWaterClassSpecialPower40Accuracy100%PP25Squirts water to attack.Where1F, near the southwest corner of the floor near the southwest corner, then turn north along the west side, where a Bug Catcher spots you.
  2. Go east past the sign and face the Lass's lone Clefairy, then keep east until the Super NerdSuper Nerd₱275MagnemiteLv 11VoltorbLv 11Weak toGround and a second Bug Catcher battle you.
  3. Pick up the Rare CandyRare CandyITEM · VITAMIN1F, near the southeast corner of the floor near the southeast corner, then climb north along the east side until a Lass near the top battles you.
  4. Cross west until a YoungsterYoungster₱150RattataLv 10RattataLv 10ZubatLv 10Weak toFightingElectricIcePsychicRock spots you, collect the Moon StoneMoon StoneITEM · EVOLUTION1F, in the northwest area of the floor in the northwest area, then beat the HikerHiker₱350GeodudeLv 10GeodudeLv 10OnixLv 10Weak to4×Water4×GrassIceFightingGround and climb down his ladder to B1F.
TM12 Water Gun
Rare Candy
Moon Stone

B1F

0 TRAINERS · 0 ITEMS · 4 SPECIES
2
On B1F you meet no trainers and find no items, only short tunnels that each link one ladder from above to its own walled-off section of B2F.
  1. Follow the tunnel from the northwest ladder to its far ladder and climb down to B2F, landing in the main basement that leads out.
  2. The tunnels under the east and middle ladders upstairs are side trips, each dropping into a sealed pocket that a Rocket guards.

B2F

5 TRAINERS · 4 IN THE STEPS · 5 ITEMS · 4 SPECIES
3
Neither pocket has a second way out, so after each one you climb back to the first floor, saving the northwest ladder for last.
  1. Climb down the easternmost 1F ladder, fight the Rocket north of your landing, then take the HP UpHP UpITEM · VITAMINB2F, on a plateau to the far east of a Team Rocket Grunt in a closed-off room accessible from the easternmost ladder on 1F on the plateau far east in that closed-off room.
  2. Down the 1F ladder between the other two, walk east until a Rocket spots you, then climb north to TM01 Mega PunchMoveMega PunchNormalClassPhysicalPower80Accuracy85%PP20A powerful punch thrown very hard. on the closed-off room's plateau.
Team Rocket battle · fight 2RocketSandshrew · Rattata · ZubatLv 11₱330
HP Up
Team Rocket battle · fight 3RocketZubat · EkansLv 12₱360
TM01 Mega Punch
4
Whichever fossil you pick leaves the only gap in the north wall of their room, and that gap is your road to the exit.
  1. From the northwest ladder's landing, fight the Rocket in the raised chamber to the east, then circle down the east side and back west along the bottom.
  2. Go up the west side until a Rocket you cannot slip past spots you, then take the hidden Moon StoneMoon StoneITEM · EVOLUTION1F, in the northwest area of the floor from the wall southeast of the Super Nerd.
  3. Walk north into his room and the Super NerdSuper Nerd₱300GrimerLv 12VoltorbLv 12KoffingLv 12Weak toGroundPsychicBug battles you. After defeating him, take the Helix FossilHelix FossilKEY ITEMB2F, choice between this or the Dome Fossil after defeating the Super Nerd or the Dome Fossil; he pockets whichever one remains.
  4. Go north through the gap your fossil leaves and west to the ladder, then climb it and the next ladder east to reach Route 4.
Team Rocket battle2 fights · ₱870
4Rocket₱480
1Rocket₱390
Moon Stone
Dome Fossil
Helix Fossil

Pokemon Encounters

Zubat swarms every floor and Geodude fills the gaps. The real hunt is Clefairy, stingy at 1% to 6%. This is the only place to find one for a long while, so pack patience.

Floor
Type
▾1F4
Walking4
#041Zubat
79% - Lv 6–11
#074Geodude
15% - Lv 8–10
#046Paras
5% - Lv 8
#035Clefairy
1% - Lv 8
▾B1F4
Walking4
#041Zubat
60% - Lv 7–11
#074Geodude
26% - Lv 7–9
#046Paras
10% - Lv 10
#035Clefairy
4% - Lv 9
▾B2F4
Walking4
#041Zubat
49% - Lv 9–12
#074Geodude
30% - Lv 9–10
#046Paras
15% - Lv 10–12
#035Clefairy
6% - Lv 10–12
Zubat
#041

Zubat

PoisonFlying
Evolves into Golbat at Lv 22
Encounter rate
79% Common
Level
6–11
EV yield
1 Speed
Here on Mt. Moon1Ftall grass79% spawn
1 in 1wild encounters
will be Zubat — about 36s of walking through grass to catch one.
Catch odds
~2m
to catch one
Poke Ball34%
Great Ball50%
Ultra Ball34%
Nuzlocke
79%
first wild (est.)
TierHigh
PickReliable

ITEMS

Choose one fossil after the Rocket fight: Dome for Kabuto or Helix for Omanyte. Two Moon Stones, one tucked out of sight, evolve Clefairy and the Nidorans, alongside TM01 Mega Punch.

Source
Floor
TM2
TM12 Water Gun
1F
TM01 Mega Punch
B2F
NPC gift2
Dome Fossil
B2F
Helix Fossil
B2F
Vitamin2
Rare Candy
1F
HP Up
B2F
Item ball3
Escape Rope
1F
Moon Stone
1F
Potion
1F
Hidden2
Ether
B2F
Moon Stone
B2F
TM

TM12 Water Gun

Found on 1F · near the southwest corner of the floor
Move
Water GunWaterSpecial
Power
40
Accuracy
100%
PP
25

Water Gun deals damage with no additional effect.

TM2
TM

TM12 Water Gun

Found on 1F · near the southwest corner of the floor
Move
Water GunWaterSpecial
Power
40
Accuracy
100%
PP
25

Water Gun deals damage with no additional effect.

TM

TM01 Mega Punch

Found on B2F · on a plateau north of a Team Rocket Grunt in a closed-off room accessible from the ladder between the other two ladders on 1F
Move
Mega PunchNormalPhysical
Power
80
Accuracy
85%
PP
20

Mega Punch deals damage with no additional effect.

NPC gift2
NPC GIFT

Dome Fossil

Found on B2F · choice between this or the Helix Fossil after defeating the Super Nerd
Effect

Can be revived into a Kabuto.

NPC GIFT

Helix Fossil

Found on B2F · choice between this or the Dome Fossil after defeating the Super Nerd
Effect

Can be revived into an Omanyte.

Vitamin2
VITAMIN

Rare Candy

Found on 1F · near the southeast corner of the floor
Effect

Causes a level-up and raises happiness.

VITAMIN

HP Up

Found on B2F · on a plateau to the far east of a Team Rocket Grunt in a closed-off room accessible from the easternmost ladder on 1F
Effect

Raises HP effort and happiness.

Item ball3
ITEM BALL

Escape Rope

Found on 1F · northeast of the Rare Candy, in the east area of the floor
Effect

Transports user to the outside entrance of a cave.

ITEM BALL

Moon Stone

Found on 1F · in the northwest area of the floor
Moon Stone evolves· 4 species
NidorinaPoison
NidoqueenPoisonGround
NidorinoPoison
NidokingPoisonGround
ClefairyNormal
ClefableNormal

Evolves a Nidorina into Nidoqueen, a Nidorino into Nidoking, a Clefairy into Clefable, or a Jigglypuff into Wigglytuff.

ITEM BALL

Potion

Found on 1F · two pickups: one in the southwest area near TM12, another in the south area near the Super Nerd
Effect

Restores 20 HP.

Hidden2
HIDDEN

Ether

Found on B2F · on the rock northeast of a Team Rocket Grunt in a closed-off room accessible from the ladder between the other two ladders on 1F
Effect

Restores 10 PP for one move.

HIDDEN

Moon Stone

Found on B2F · southeast of the Super Nerd, on the wall (hidden)
Moon Stone evolves· 4 species
NidorinaPoison
NidoqueenPoisonGround
NidorinoPoison
NidokingPoisonGround
ClefairyNormal
ClefableNormal

Evolves a Nidorina into Nidoqueen, a Nidorino into Nidoking, a Clefairy into Clefable, or a Jigglypuff into Wigglytuff.

TRAINERS

Bug Catchers and Hikers give way to the Team Rocket crew as you climb through Mt. Moon, nothing past level 16 but enough back-to-back fights to drain your supplies.

Class
Floor
Super Nerd2
Super NerdLv 11₱275
Super NerdLv 12₱300
Hiker1
HikerLv 10₱350
Bug Catcher1
Bug CatcherLv 11₱110
Youngster1
YoungsterLv 10₱150
Lass1
LassLv 11₱165
Trainer1
RocketLv 13₱330
HIKER

Hiker

Party
3
Highest Lv
10
Reward
₱350
Party
GeodudeLv 10
RockGround
Ability-NatureFixedItem-
Tackle
-
-
-
GeodudeLv 10
RockGround
Ability-NatureFixedItem-
Tackle
-
-
-
OnixLv 10
RockGround
Ability-NatureFixedItem-
Tackle
Screech
-
-
Team weak to6 types
Type
4x weakness(2)
WATER
GRASS
2x weakness(4)
ICE
FIGHTING
GROUND
STEEL
Win: ₱350

Mt. Moon Guide

  • Yes, and it's easy to walk past. A Moon Stone sits on the cave floor among the Rocket grunts, and it's the item that evolves Clefairy into Clefable plus Nidorina and Nidorino into Nidoqueen and Nidoking. No shop sells them, so grab every item ball you pass on the way down.

  • Rocket grunts and a pair of Super Nerds are digging for the fossils, so you battle through them to reach the choice at the back. A Super Nerd then offers the Dome Fossil or the Helix Fossil. Whichever you turn down is gone for that save, so trade later if you want both.

  • Rock Tunnel is the only one you can't see inside. Mt. Moon, the Seafoam Islands, Victory Road, and the Unknown Dungeon all light themselves, so Flash is just a convenience there. Claim HM05 Flash from Oak's Aide in the Route 2 gatehouse once you've caught ten different species.

  • Victory Road and the Seafoam Islands both gate progress behind it. Victory Road uses boulder-on-switch puzzles to open doors, while Seafoam needs you to shove boulders into holes to kill the water current. You earn HM04 Strength from the Safari Zone Warden after returning his Gold Teeth.

  • Worth it when you're only passing through. Repels turn off any encounter weaker than your lead Pokemon, which makes a high-level run through Golbat-infested Victory Road far quieter. Just pull the Repel back off when you actually want a rarity like Chansey or Clefairy to appear.

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