Grimer in FireRed.
Grimer appears in 14 places in Pokemon FireRed. The best odds are Pokémon Mansion (walking in grass or caves, 20% at level 28).
Where to find Grimer
odds are the game's slot tables| Area | How | Level | Odds |
|---|---|---|---|
| Pokémon Mansion1F | Walking in grass or caves (LeafGreen only) | 28 | 20% |
| Pokémon Mansion2F | Walking in grass or caves (LeafGreen only) | 28 | 20% |
| Pokémon Mansion3F | Walking in grass or caves (LeafGreen only) | 28 | 20% |
| Pokémon MansionB1F | Walking in grass or caves (LeafGreen only) | 28 | 20% |
| Pokémon Mansion1F | Walking in grass or caves (LeafGreen only) | 30 | 10% |
| Pokémon Mansion2F | Walking in grass or caves (LeafGreen only) | 30 | 10% |
| Pokémon Mansion3F | Walking in grass or caves (LeafGreen only) | 30 | 10% |
| Pokémon MansionB1F | Walking in grass or caves (LeafGreen only) | 30 | 10% |
| Pokémon Mansion1F | Walking in grass or caves (FireRed only) | 28 | 5% |
| Pokémon Mansion2F | Walking in grass or caves (FireRed only) | 28 | 5% |
| Pokémon Mansion3F | Walking in grass or caves (FireRed only) | 28 | 5% |
| Pokémon MansionB1F | Walking in grass or caves (FireRed only) | 28 | 5% |
| Celadon CityCeladonCity | Super Rod (FireRed only) | 30-40 | 1% |
| Celadon CityCeladonCity | Super Rod (LeafGreen only) | 30-40 | 1% |
Evolution
2 stages
Grimer
MukEvolves into Muk at level 38.
Evolve now or wait
from the game's learnsets and the relearner ruleGrimer evolves at level 38. Nothing is lost by evolving straight away: every move Grimer learns after that, Muk learns too.
Rule the game applies: the Move Relearner on Two Island (he takes two Tiny Mushrooms or one Big Mushroom) teaches only the level-up moves of the form you hand him, at or below its current level. Delaying an evolution costs the evolved form's higher base stats for every level you wait; a move you barely use is not worth that.
Grimer learnset in FireRed
10 level-up moves · 24 machinesBy level
Muk by level
TMs and HMs it can learn (24)
TM06 Toxic, TM10 Hidden Power, TM11 Sunny Day, TM12 Taunt, TM17 Protect, TM18 Rain Dance, TM19 Giga Drain, TM21 Frustration, TM24 Thunderbolt, TM25 Thunder, TM27 Return, TM28 Dig, TM32 Double Team, TM34 Shock Wave, TM35 Flamethrower, TM36 Sludge Bomb, TM38 Fire Blast, TM39 Rock Tomb, TM41 Torment, TM42 Facade, TM43 Secret Power, TM44 Rest, TM45 Attract, TM46 Thief