Is Muk Good in Ruby & Sapphire Playthrough?
AbilityStench keeps wild encounters away, a travel convenience. Muk's physical bulk and HP absorb hits from Sidney, Norman, and most physical attackers. Native to Hoenn via Fiery Path. Not the flashiest pick but surprisingly durable.
Roxanne's typing presses Grimer's defenses.
Grimer trades roughly evenly with Brawly's team.
Wattson's typing presses Grimer's defenses.
Grimer trades roughly evenly with Flannery's team.
Norman's typing presses Grimer's defenses.
Grimer trades roughly evenly with Winona's team.
Tate & Liza's team hits Muk's weaknesses hard.
Muk trades roughly evenly with Wallace's team.
Muk has the type edge here and should clean up Sidney's team.
Phoebe's team hits Muk's weaknesses hard.
Muk has the type edge here and should clean up Glacia's team.
Muk trades roughly evenly with Drake's team.
Steven's team hits Muk's weaknesses hard.
Catch Grimer
Catch Grimer in Fiery Path (walking, Lv 14, rare).
Recommended Moves
- STARTING (Lv 14)
- LV 14PoisonSludgePower 98Accuracy 100%PP 20
- After Brawly
- TM35FireFlamethrowerPower 95Accuracy 100%PP 15Mauville Game Corner
- TM24ElectricThunderboltPower 95Accuracy 100%PP 15Mauville Game Corner
- After Wattson
- TM43NormalSecret PowerPower 70Accuracy 100%PP 20Route 111
- After Norman
- TM38FireFire BlastPower 120Accuracy 85%PP 5Lilycove Department Store
- TM25ElectricThunderPower 120Accuracy 70%PP 10Lilycove Department Store
- TM42NormalFacadePower 70Accuracy 100%PP 20Prize for defeating Norman
- LV 43PoisonSludge BombPower 135Accuracy 100%PP 10
Evolve Grimer to Muk
Grimer evolves into Muk at Level 38. Your Grimer should hit Level 38 before you reach Tate & Liza, at typical leveling pace.
Recommended Moves
- STARTING (Lv 38)
- LV 38PoisonSludgePower 98Accuracy 100%PP 20
- After Brawly
- TM35FireFlamethrowerPower 95Accuracy 100%PP 15Mauville Game Corner
- TM24ElectricThunderboltPower 95Accuracy 100%PP 15Mauville Game Corner
- After Norman
- TM01FightingFocus PunchPower 150Accuracy 100%PP 20Route 115
- TM15NormalHyper BeamPower 150Accuracy 90%PP 5Lilycove Department Store
- TM38FireFire BlastPower 120Accuracy 85%PP 5Lilycove Department Store
- TM25ElectricThunderPower 120Accuracy 70%PP 10Lilycove Department Store
- LV 47PoisonSludge BombPower 135Accuracy 100%PP 10
How to Get Muk in Ruby & Sapphire
Catch a Grimer in the Fiery Path and grind it to level 38. No wild Muk waits anywhere in Hoenn.
Wild Muk may be holding when caught:
Nugget (5% chance) A nugget of pure gold. Can be sold at a high price.Catch Grimer at any of these 1 spot to eventually evolve into Muk.
Encountered via tall grass encounters
- 1Catch Grimer
- 2Evolve Mukat Lv.38
Badge 3How to Obtain Muk in RS
- Step 2Muk ✓BREEDINGAvailableLeave a compatible parent at the Pokemon Day Care to receive a Grimer egg.
How to Get Shiny Muk in Ruby & Sapphire
Evolution is the only route to Muk, which never appears wild; catch a shiny Grimer in the Fiery Path and evolve it into Muk. Compare Shiny Muk odds across every game
Ruby & Sapphire Shiny Muk Calculator
2 MethodsBoth methods here share the same odds, about 1 in 8,192 on each try. Pick whichever fits how you play.
Full Odds: Walk through grass, surf, or fish. Every encounter is its own independent shiny roll.
Breeding: Hatch eggs of this line; each egg rolls at the base shiny rate (no Masuda before Gen IV).
How many you have done, or plan to do.
| Chance | Encounters | Time |
|---|---|---|
| 10%lucky few | 864-- | -- |
| 25%one in four | 2,357-- | -- |
| 50%coin flip | 5,678-- | -- |
| 90%very likely | 18,862-- | -- |
Time assumes -- at your pace and does not change your shiny odds.
How is this calculated?
Every encounter has the same shiny chance, the Shiny Odds Per Try shown above. Each one is a separate roll that does not care how many you have already done, so the more you hunt, the higher your overall chance of at least one shiny. The formula below turns your odds and your number of tries into that combined chance.
chance after N tries = 1 − (1 − p)^N, where p = 1 / odds per try
Example at 1 in 8,192 (classic full odds): about 864 encounters for a 10 percent chance, 5,678 for 50 percent, and 18,862 for 90 percent.
The table above flips that around: it shows how many encounters it takes to reach a 10, 25, 50, and 90 percent chance at your current odds. Turning on boosts like the Shiny Charm, sandwiches, or chains improves your odds, so the encounter numbers drop.
These are estimates, not promises. Most games have no pity counter, meaning no guaranteed shiny no matter how many you hunt, so even Very Likely is not guaranteed: some hunters find one early, others go well past that point.
For time estimates and charm math, open the Ruby & Sapphire shiny odds calculator with Muk already selected.
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
Avg
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 take an average time to hatch. 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 Amorphous egg group. Notable egg moves include Curse, Explosion, Haze and 4 more.
RS Muk Best Moveset
105 Attack fires MoveSludge Bomb for Poison TermStab and MoveExplosion for the massive finisher. AbilitySticky Hold protects Held ItemLeftovers from removal, ensuring sustained recovery. MoveCurse boosts Attack and Defense. Item security on a bulky physical attacker.
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
All 29 TMs are obtainable before the Elite Four
Egg Moves
Tutor Moves
Base Stats
From MUK’s body seeps a foul fluid that gives off a nose-bendingly horrible stench. Just one drop of this POKéMON’s body fluid can turn a pool stagnant and rancid.
This POKéMON’s favorite food is anything that is repugnantly filthy. In dirty towns where people think nothing of throwing away litter on the streets, MUK are certain to gather.
Muk Ruby & Sapphire Guide
Muk is obtained in Pokemon Ruby & Sapphire by evolving Grimer under specific conditions.
Game Availability
Available since Red & Blue, Muk appears in 19 games spanning 9 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 7Let's Go
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
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