Is Muk Good in FireRed & LeafGreen Playthrough?
Muk takes hits through raw HP and hits back with physical Poison. AbilityStench occasionally flinches opponents on contact. AbilitySticky Hold protects held items. Neither ability defines fights. Muk contributes against Erika and absorbs hits from physical attackers through the E4. Not a star, but hard to take down.
Brock's typing presses Grimer's defenses.
Grimer trades roughly evenly with Misty's team.
Grimer trades roughly evenly with Lt. Surge's team.
Grimer trades roughly evenly with Erika's team.
Koga's typing presses Grimer's defenses.
Sabrina's team hits Grimer's weaknesses hard.
Muk has the type edge here and should clean up Blaine's team.
Muk trades roughly evenly with Giovanni's team.
Muk trades roughly evenly with Lorelei's team.
Muk trades roughly evenly with Bruno's team.
Agatha's team hits Muk's weaknesses hard.
Muk trades roughly evenly with Lance's team.
Muk trades roughly evenly with Terry's team.
Catch Muk on Pokémon Mansion (walking, Lv 32, rare).
- STARTING (Lv 32)
- LV 32PoisonSludge98100%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
Catch Grimer on Pokémon Mansion (walking, Lv 28, rare).
- 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
How to Get Muk in FireRed & LeafGreen
LeafGreen exclusive with just two rare walking encounters, both inside the same late-game building. Muk is one of the thinnest map entries in the game.
1 location to catch Muk2 locations to catch Grimer
Encountered via tall grass encounters
Encountered via fishing with a Rod, tall grass encounters
Badge 7Catch Grimer at any of the 2 locations below, then level it up to 38 — it evolves into Muk.
Badge 4
Badge 5
Badge 6 Badge 7Where To Catch Muk in FRLG
The path to Muk starts with Grimer at Lv. 28-40 via walking and fishing encounters. 2 catchable stages total, with locations listed for each one below.
Muk Weakness
Ground and Psychic moves hit Muk for super-effective damage. The Poison typing picks up 4 resistances to work with. Muk's special bulk (base 100 Sp.Def) helps absorb special-type weaknesses, though physical moves exploit the lower Defense.
| Damage | Types |
|---|---|
| 2x (Weak) | Ground, Psychic |
| 0.5x (Resist) | Grass, Fighting, Poison, Bug |
- Dark and Steel types added — Fairy does not exist yet
- Moves are Physical or Special based on type, not per move
What is Muk Weak Against
AvgBest Pokemon Against Muk
S | ||
Recommended Build AbilityNatural Cure ItemLeftovers NatureModest Moves
Damage vs Muk View Blissey builds →Ice Beam18-21% | ||
A | ||
Recommended Build AbilityPressure ItemLeftovers NatureTimid Moves
Damage vs Muk View Zapdos builds →Thunderbolt23-27% | ||
A | ||
Recommended Build AbilityNatural Cure ItemLeftovers NatureBold Moves
Damage vs Muk View Celebi builds →Psychic 2x33-39% Giga Drain7-8% | ||
A | ||
Recommended Build AbilityPressure ItemLeftovers NatureBold Moves
Damage vs Muk View Suicune builds →Surf14-17% Ice Beam14-17% | ||
A | ||
Recommended Build AbilityImmunity ItemLeftovers NatureAdamant Moves
Damage vs Muk View Snorlax builds →Shadow Ball23-28% Body Slam25-29% Self Destruct58-69% Earthquake 2x59-69% | ||
Muk Evolutions
Muk is what Grimer becomes. Breed it for Grimer eggs (average hatch time). A decent partner pool for breeding via one egg group. Eggs are average hatch time. The evolution from Grimer pushed Muk to 500 total stats. Sp.Def saw the largest single gain at +50. View every chain in the Evolution Chart.
How to Evolve
Breeding
Breed with Muk to get Grimer eggs easily using 22 partners from the Indeterminate egg group. Notable egg moves include Curse, Explosion, Haze and 4 more.
FRLG Muk Best Moveset
105 HP with 105 Attack and 100 Sp. Def creates a bulky physical Poison attacker. AbilitySticky Hold protects Held ItemLeftovers from removal. MoveSludge Bomb hits from the physical side as Poison TermStab. The moveset absorbs special attacks while threatening back with physical power, and MoveExplosion closes out games.
Best Build
Muk best EVs are HP and Attack
Physical Tank Moveset
- Sludge Bomb
- Explosion
- Curse
- Focus Punch
Recommended Teammates
Moves List
Don't skip the egg moves. Muk picks up Curse and Explosion only through breeding, and both fill gaps the natural movepool can't. STAB runs through Sludge Bomb and Sludge while coverage across 9 types adds range.
How to Read the Moves Table
Tabs
- Level-Up
- Learned by leveling up.
- TM
- Taught by a Technical Machine.
- Egg
- Inherited via breeding.
- Tutor
- NPC tutor (cost: items, BP, money).
- Reminder
- An NPC reteaches any move this Pokemon could have learned by leveling up.
- Transfer
- Carried over from an older game using Pokemon HOME.
- Event
- Given out through Mystery Gift events.
Visual Signals
CAT (Category)
How the move deals damage and which stats it uses.
A small dot on the icon's corner marks the move as contact. That triggers abilities like Static, Flame Body, Rough Skin, or Iron Barbs, plus items like Rocky Helmet and Sticky Barb.
Tier (S to D)
Each move's competitive rank in RankedBoost's system. TM, Egg, and Tutor sort by tier by default (best first). On Level-Up, click the Tier header to do the same.
PWR (Power)
Base damage. Numbers shown in a type color include STAB (base × 1.5). Hover any colored number to see the math.
— means no power (status moves) or variable power.
Sorting & Filter
Click any column header to sort. Level-Up opens with Lv 1 at the top. TM, Egg, and Tutor open with the highest-tier moves at the top.
Search filters by move name or type. The Filter button limits the list to STAB, Physical, Special, or Status moves.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Base Stats
It is usually undetectable because it blends in with the ground. Touching it can cause terrible poisoning.
Thickly covered with a filthy, vile sludge. It is so toxic, even its footprints contain poison.
Muk FireRed & LeafGreen Guide
- Why can't I find Muk in FireRed?
Muk is exclusive to Pokemon LeafGreen. FireRed players have to trade for one.
See the Locations section above for where to find Muk in LeafGreen.
How to trade in FireRed and LeafGreen
GBA cartridges: You need a Game Boy Advance Game Link Cable and both players' FireRed/LeafGreen cartridges. Trade at the Cable Club on the 2nd floor of any Pokemon Center, which opens up shortly after Oak gives you the Pokedex.Nintendo Switch (2026 release): Trading uses local wireless only. There is no online play, and no Nintendo Switch Online subscription is required. Both players head to the Pokemon Wireless Club on the 2nd floor of any Pokemon Center, then step into a Union Room. Up to four other players can join. Available once you have the Pokedex from Professor Oak.
Game Availability
Available since Red & Blue, Muk appears in 19 games spanning 10 generations. Beyond its original form, it gained an Alolan form in Generation 7.
Click a game to view version-specific details
- Gen 1RBDebut
Red & Blue - Gen 1Y
Yellow - Gen 2GS
Gold & Silver - Gen 2C
Crystal - Gen 3RS
Ruby & Sapphire - Gen 3E
Emerald - Gen 3FRLG
FireRed & LeafGreen - Gen 4DP
Diamond & Pearl - Gen 4Pt
Platinum - Gen 4HGSS
HeartGold & SoulSilver - Gen 5BW
Black & White - Gen 5B2W2
Black 2 & White 2 - Gen 6XY
X & Y - Gen 6ORAS
Omega Ruby & Alpha Sapphire - Gen 7SMAlolan
Sun & Moon - Gen 7USUM
Ultra Sun & Ultra Moon - Gen 7LGPE
Let's Go Pikachu & Eevee - Gen 8SwSh
Sword & Shield - Gen 8BDSP
Brilliant Diamond & Shining Pearl - Gen 8PLA
Legends: Arceus - Gen 9SV
Scarlet & Violet - Gen 9LZA
Legends: Z-A - Gen 10WW
Winds & Waves