Physical
Trick Room
25Speed · Very Slow

Is Grimer Good in FireRed & LeafGreen Playthrough?

Contact sometimes triggers a flinch through AbilityStench. AbilitySticky Hold prevents item theft instead. Muk at 38 has enormous HP and Attack for a Poison-type. Doesn't threaten any gym leader super-effectively, but the bulk keeps Muk alive through fights it shouldn't survive. Poison coverage contributes against Erika.

StrongGoodEvenToughBadTEEETTGEEETEEBrockGym 1MistyGym 2SurgeGym 3ErikaGym 4KogaGym 5SabrinaGym 6GrimerCatchableMukEvolveBlaineGym 7GiovanniGym 8LoreleiE4BrunoE4AgathaE4LanceE4TerryChamp*
Brock
Gym 1
Tough

Brock's typing presses Grimer's defenses.

Even
Geodude
Lv 12
RockGround
Rock Head
TackleDefense Curl
Risky
Onix
Lv 14
RockGround
Rock Head
TackleBindRock Tomb
Misty
Gym 2
Even

Grimer trades roughly evenly with Misty's team.

Even
Staryu
Lv 18
Water
Illuminate
TackleHardenRecoverWater Pulse
Even
Starmie
Lv 21
WaterPsychic
Illuminate
SwiftRecoverRapid SpinWater Pulse
Lt. Surge
Gym 3
Even

Grimer trades roughly evenly with Lt. Surge's team.

You Win
Voltorb
Lv 21
Electric
Soundproof
Sonic BoomTackleScreechShock Wave
You Win
Pikachu
Lv 18
Electric
Static
Quick AttackThunder WaveDouble TeamShock Wave
Even
Raichu
Lv 24
Electric
Static
Quick AttackThunder WaveDouble TeamShock Wave
Erika
Gym 4
Even

Grimer trades roughly evenly with Erika's team.

Even
Victreebel
Lv 29
GrassPoison
Chlorophyll
Stun SporeAcidPoison PowderGiga Drain
You Win
Tangela
Lv 24
Grass
Chlorophyll
Poison PowderConstrictIngrainGiga Drain
Risky
Vileplume
Lv 29
GrassPoison
Chlorophyll
Sleep PowderAcidStun SporeGiga Drain
Koga
Gym 5
Tough

Koga's typing presses Grimer's defenses.

Avoid
Koffing
Lv 37
Poison
LevitateImmune to Ground attacks
Self DestructSludgeSmokescreenToxic
Even
Muk
Lv 39
Poison
Stench
MinimizeSludgeAcid ArmorToxic
Avoid
Koffing
Lv 37
Poison
LevitateImmune to Ground attacks
Self DestructSludgeSmokescreenToxic
Avoid
Weezing
Lv 43
Poison
LevitateImmune to Ground attacks
TackleSludgeSmokescreenToxic
Sabrina
Gym 6
Tough

Sabrina's team hits Grimer's weaknesses hard.

Even
Kadabra
Lv 38
Psychic
Synchronize
PsybeamReflectFuture SightCalm Mind
Even
Mr Mime
Lv 37
PsychicFairy
Soundproof
BarrierPsybeamBaton PassCalm Mind
Risky
Venomoth
Lv 38
BugPoison
Shield Dust
PsybeamGustLeech LifeSupersonic
Risky
Alakazam
Lv 43
Psychic
Synchronize
PsychicRecoverFuture SightCalm Mind
Blaine
Gym 7
Good

Muk has the type edge here and should clean up Blaine's team.

You Win
Growlithe
Lv 42
Fire
Intimidate
BiteRoarTake DownFire Blast
You Win
Ponyta
Lv 40
Fire
Run Away
StompBounceFire SpinFire Blast
You Win
Rapidash
Lv 42
Fire
Run Away
StompBounceFire SpinFire Blast
Even
Arcanine
Lv 47
Fire
Intimidate
BiteRoarTake DownFire Blast
Giovanni
Gym 8
Even

Muk trades roughly evenly with Giovanni's team.

You Win
Rhyhorn
Lv 45
GroundRock
Lightning Rod
Take DownRock BlastScary FaceEarthquake
Risky
Dugtrio
Lv 42
Ground
Sand Veil
SlashSand TombMud SlapEarthquake
Risky
Nidoqueen
Lv 44
PoisonGround
Poison Point
Body SlamDouble KickPoison StingEarthquake
Risky
Nidoking
Lv 45
PoisonGround
Poison Point
ThrashDouble KickPoison StingEarthquake
You Win
Rhyhorn
Lv 50
GroundRock
Lightning Rod
Take DownRock BlastScary FaceEarthquake
Lorelei
Elite Four
Even

Muk trades roughly evenly with Lorelei's team.

Even
Dewgong
Lv 52
WaterIce
Thick Fat
Ice BeamSurfHailSafeguard
You Win
Cloyster
Lv 51
WaterIce
Shell Armor
SpikesProtectHailDive
You Win
Slowbro
Lv 52
WaterPsychic
Oblivious
Ice BeamSurfAmnesiaYawn
Even
Jynx
Lv 54
IcePsychic
Oblivious
Ice PunchDouble SlapLovely KissAttract
Even
Lapras
Lv 54
WaterIce
Water Absorb
Confuse RayIce BeamSurfBody Slam
Bruno
Elite Four
Even

Muk trades roughly evenly with Bruno's team.

You Win
Onix
Lv 51
RockGround
Rock Head
EarthquakeRock TombIron TailRoar
Even
Hitmonchan
Lv 53
Fighting
Keen Eye
Sky UppercutMach PunchRock TombCounter
Even
Hitmonlee
Lv 53
Fighting
Limber
Mega KickForesightBrick BreakFacade
Even
Onix
Lv 54
RockGround
Rock Head
Double EdgeEarthquakeIron TailSand Tomb
Even
Machamp
Lv 56
Fighting
Guts
Cross ChopBulk UpScary FaceRock Tomb
Agatha
Elite Four
Tough

Agatha's team hits Muk's weaknesses hard.

Risky
Gengar
Lv 54
GhostPoison
LevitateImmune to Ground attacks
Shadow PunchConfuse RayToxicDouble Team
Risky
Golbat
Lv 54
PoisonFlying
Inner Focus
Confuse RayPoison FangAir CutterBite
Risky
Haunter
Lv 53
GhostPoison
LevitateImmune to Ground attacks
HypnosisDream EaterCurseMean Look
Even
Arbok
Lv 56
Poison
Intimidate
Sludge BombScreechIron TailBite
Risky
Gengar
Lv 58
GhostPoison
LevitateImmune to Ground attacks
Shadow BallSludge BombHypnosisNightmare
Lance
Elite Four
Even

Muk trades roughly evenly with Lance's team.

You Win
Gyarados
Lv 56
WaterFlying
Intimidate
Hyper BeamDragon RageTwisterBite
Even
Dragonair
Lv 54
Dragon
Shed Skin
Hyper BeamSafeguardDragon RageOutrage
Even
Dragonair
Lv 54
Dragon
Shed Skin
Hyper BeamSafeguardThunder WaveOutrage
Risky
Aerodactyl
Lv 58
RockFlying
Rock Head
Hyper BeamAncient PowerWing AttackScary Face
Even
Dragonite
Lv 60
DragonFlying
Inner Focus
Hyper BeamSafeguardOutrageWing Attack
Terry
Champion
Even

Muk trades roughly evenly with Terry's team.

Even
Heracross
Lv 72
BugFighting
Swarm
MegahornEarthquakeCounterRock Tomb
Risky
Alakazam
Lv 73
Psychic
Synchronize
PsychicShadow BallCalm MindReflect
Even
Tyranitar
Lv 72
RockDark
Sand Stream
CrunchEarthquakeThunderboltAerial Ace
You Win
Gyarados
Lv 73
WaterFlying
Intimidate
Hydro PumpDragon DanceEarthquakeHyper Beam
Even
Arcanine
Lv 73
Fire
Intimidate
Extreme SpeedOverheatAerial AceIron Tail
Risky
Venusaur
Lv 75
GrassPoison
Overgrow
Solar BeamSludge BombEarthquakeSunny Day
Catchable
Available after Badge 6
Type
Poison
Tier
E

Catch Grimer on Pokémon Mansion (walking, Lv 28, rare).

View Grimer locations

Recommended Moves
  • STARTING (Lv 28)
    • LV 28PoisonSludge98100%20
  • After Lt. Surge
    • TM28GroundDig80100%10
  • After Erika
    • TM25ElectricThunder11070%10
    • TM35FireFlamethrower90100%15
    • TM24ElectricThunderbolt90100%15
    • LV 43PoisonSludge Bomb135100%10
  • After Blaine
    • TM38FireFire Blast11085%5
  • Post-Game
    • TUTORNormalBody Slam85100%15
    • TM42NormalFacade70100%20
Evolve Grimer to Muk
Level 38
Type
Poison
Tier
A

Your Grimer should hit Level 38 before you reach Blaine, at typical leveling pace.

View Muk locations

Recommended Moves
  • STARTING (Lv 38)
    • LV 38PoisonSludge98100%20
  • After Erika
    • TM15NormalHyper Beam15090%5
    • TM35FireFlamethrower90100%15
    • TM24ElectricThunderbolt90100%15
  • After Koga
    • TM01FightingFocus Punch150100%20
    • LV 47PoisonSludge Bomb135100%10
  • After Blaine
    • TM38FireFire Blast11085%5
  • Post-Game
    • TUTORNormalBody Slam85100%15
    • TM42NormalFacade70100%20

How to Get Grimer in FireRed & LeafGreen

Grimer has six encounters in both versions split between walking and Super Rod. Common at a couple of spots, rare at the rest. Tight map presence.

2 locations to catch Grimer

Encountered via fishing with a Rod, tall grass encounters

Badge 4
Badge 5
Badge 6
Badge 7

Grimer Weakness

Grimer is weak to Ground and Psychic. 4 resistances help offset the weaknesses. Just 2 weak spots to worry about, which keeps teambuilding straightforward.

Grimer Weakness and Resistance Chart
DamageTypes
2x (Weak)Ground, Psychic
0.5x (Resist)Grass, Fighting, Poison, Bug
Gen III Type Chart
  • Dark and Steel types added — Fairy does not exist yet
  • Moves are Physical or Special based on type, not per move

What is Grimer Weak Against

Avg
2Weak
4Resist
0Immune
Score0
4xCritical
None
¼xResist
None
0xImmune
None

What is Grimer Strong Against

1Strong
4Resisted
1Immune
Score-4
2xStrong
0xImmune

Best Pokemon Against Grimer

Grimer Evolutions

One evolution ahead. Grimer grows into Muk through a straightforward two-stage chain. A decent partner pool for breeding via one egg group. Eggs are average hatch time. Evolving adds up to 175 stat points total. View every chain in the Evolution Chart.

How to Evolve

2 Forms
Stat Comparison 2 Stages
Grimer
Poison
Muk
Poison
HP
80
105+25
ATK
80
105+25
DEF
50
75+25
SP.ATK
40
65+25
SP.DEF
50
100+50
SPE
25
50+25
BST
325C-Tier
500C-Tier+175
ROLE
Trick Room
Tank
TYPE
Physical
Physical

Breeding

Very Easy

Breed Grimer easily with 22 breeding partners from the Indeterminate egg group. Pass egg moves like Curse, Explosion, Haze and 4 more to offspring.

Egg Groups
Gender
50.0%50.0%
Hatch Time
20 cycles·5,140 steps
Quick~5 min with Flame Body
Egg Moves
7moves
Breed With (best first)
gardevoirkirliacastformraltsmukgengarweezingswalotmagcargohaunterwobbuffetkoffing

FRLG Grimer Best Moveset

80 HP and 80 Attack with AbilitySticky Hold preventing item theft. Too slow and frail for competitive play at 25 Speed. Muk's bulkier moveset is one evolution away.

Best Build

Experimental
Wall
Ability
Sticky Hold
Item
LeftoversSUSTAIN
Best Nature for Grimer
Sassy+SPD

Grimer best EVs are HP and Sp. Def

EVs

Wall Moveset

  • ToxicUtility
  • Sludge BombSTAB
  • DigCoverage
  • Acid ArmorSTAB

Moves List

Breeding opens up real options for Grimer. Curse and Explosion come exclusively from egg moves, and they're worth the effort. The rest of the kit covers basics through Sludge Bomb and Sludge and coverage across 8 types.

Level-Up Moves

Lv 1
Poison Gas
5540Poison
Lv 1
Pound
D4010035Normal
Lv 4
Harden
C30Normal
Lv 8
Disable
D5520Normal
Lv 13
Sludge
9710020Poison
Lv 19
Minimize
20Normal
Lv 26
Screech
D8540Normal
Lv 34
Acid Armor
S40Poison
Lv 43
Sludge Bomb
S13510010Poison
Lv 53
Memento
D10010Dark

TM Moves

TM
TM45
Attract
10015Normal
TM28
Dig
S6010010Ground
TM32
Double Team
15Normal
TM42
Facade
D7010020Normal
TM38
Fire Blast
D120855Fire
TM35
Flamethrower
D9510015Fire
TM21
Frustration
D10020Normal
TM19
Giga Drain
D751005Grass
TM10
Hidden Power
6010015Normal
TM17
Protect+4
C10Normal
TM18
Rain Dance
C5Water
TM44
Rest
C10Psychic
TM27
Return
D10020Normal
TM39
Rock Tomb
D609510Rock
TM43
Secret Power
7010020Normal
TM34
Shock Wave
D6020Electric
TM36
Sludge Bomb
S13510010Poison
TM11
Sunny Day
C5Fire
TM12
Taunt
C10020Dark
TM46
Thief
D6010025Dark
TM25
Thunder
D1207010Electric
TM24
Thunderbolt
D9510015Electric
TM41
Torment
D10015Dark
TM06
Toxic
S8510Poison

Egg Moves

Egg
Egg
Curse
C10Ghost
Egg
Explosion
B2501005Normal
Egg
Haze
C30Ice
Egg
Imprison
10Psychic
Egg
Lick
D2010030Ghost
Egg
Mean Look
D5Normal
Egg
Shadow Punch
6020Ghost

Tutor Moves

Tut
Tutor
Body Slam
C8510015Normal
Tutor
Explosion
B2501005Normal
Tutor
Mimic
D10Normal
Tutor
Substitute
C10Normal

Base Stats

Base Stats
Avg
HP80
C
Attack80
C
Defense50
D
Sp. Atk40
D
Sp. Def50
D
Speed25
F
Total325
Details
Catch Rate
Easy190 / 255
Growth Rate
Medium Fast1M XP
Height0.9 m
Weight30.0 kg
Base XP65
Abilities
Stench
Has a 10% chance of making target Pokémon flinch with each hit.
Sticky Hold
Prevents a held item from being removed by other Pokémon.
EV Yield
HP+1AtkDefSpASpDSpe
HP training source
Pokedex Entry

Sludge exposed to X rays from the moon transformed into GRIMER. It loves feeding on filthy things.

Appears in filthy areas. It thrives by sucking up polluted sludge that is pumped out of factories.

Grimer FireRed & LeafGreen Guide

  • Grimer can be fished up at Pokemon Mansion and Celadon City in Pokemon FireRed & LeafGreen.

Game Availability

Since debuting in Red & Blue, Grimer has appeared in 19 titles over 10 generations. Along the way, it received an Alolan form in Generation 7, keeping it relevant across different competitive metas.

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