
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.
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 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
Your Grimer should hit Level 38 before you reach Blaine, at typical leveling pace.
- 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
Where To Catch Grimer in FRLG
To get Grimer, start by catching Grimer through walking and fishing encounters at Lv. 28-40. The chain covers 2 catchable stages before reaching the final form.
Step 2Catch or Evolve into MukPokémon Mansion - 1FLv.32FloorLeafGreenRate 5%Pokémon Mansion - 2FLv.32FloorLeafGreenRate 5%Pokémon Mansion - 3FLv.32FloorLeafGreenRate 5%Pokémon Mansion - B1FLv.34FloorLeafGreenRate 5%or evolve from Grimer (Step 1)
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.
| 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 Grimer Weak Against
AvgBest Pokemon Against Grimer
In FireRed & LeafGreen, Gardevoir's Psychic hits Grimer for 71-83%.
Gardevoir PsychicFairy | B | |
Recommended Build AbilityTrace ItemLeftovers NatureTimid Moves
Damage vs Grimer View Gardevoir builds →Psychic 2x71-83% Thunderbolt23-28% | ||
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
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
Grimer best EVs are HP and Sp. Def
Wall Moveset
- Toxic
- Sludge Bomb
- Dig
- Acid Armor
Recommended Teammates
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.
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
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.
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