#088 GrimerAll 251 Pokémon#090 Shellder![]()
Gengar’s Pokédex · Kanto · Generation I
#089 Muk
Poison
- SpeciesSludge Pokémon
- Japanese nameBetbeton
- PronunciationMUCK
- Height3′ 11″ 1.19 m
- Weight66.0 lb 29.70 kg
- Gender♂ 50% · ♀ 50%

PokédexWhere to findType matchupsMovesBreedingStats

Pokédex entries
| RedBlue | Thickly covered with a filthy, vile sludge. It is so toxic, even its footprints contain poison. |
|---|---|
| Yellow | Smells so awful, it can cause fainting. Through degeneration, it lost its sense of smell. |
| Stadium | Becomes indistinguishable if it hides in dirt. Touching its sludge-covered body causes horrible poisonings. |
| GoldStadium 2 | They love to gather in smelly areas where sludge accumulates, making the stench around them worse. |
| Silver | Its body is made of a powerful poison. Touching it accidentally will cause a fever that requires bed rest. |
| Crystal | As it moves, a very strong poison leaks from it, making the ground there barren for three years. |
Where to find Muk
| Game | Where to find it | Time | Rarity |
|---|---|---|---|
| Blue | Cinnabar Island (Pokémon Mansion), Unknown Dungeon | NA | Few/Evolve |
| Red | NA | Few/Evolve | |
| Yellow | Power Planet, Cinnabar Island (In-Game Trade) | NA | Few/Evolve |
| Gold | Celadon City, Routes 16, 17, 18 | Any | Few/Evolve; Many in Celadon |
| Silver | Any | Few/Evolve; Many in Celadon | |
| Crystal | Any | Few/Evolve; Many in Celadon |
How to catch
| Ground | Surf | Fishing | Forest Tree | Mountain Tree | Rock Smash | Breed | Evolve | Event | BugCatch | Game Corner | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| R/B | ✓ | ✓ | |||||||||
| Yellow | ✓ | ✓ | ✓ | ||||||||
| G/S | ✓ | ✓ | ✓ | ||||||||
| Crystal | ✓ | ✓ | ✓ |
✓ marks how you can get it in each game. Shaded boxes are methods that didn’t exist in that game.
Type matchups
Defence: damage taken from each attack type
- Normal×1
- Fire×1
- Water×1
- Electric×1
- Grass×0.5
- Ice×1
- Fighting×0.5
- Poison×0.5
- Ground×2
- ×1
- Psychic×2
- BugG/S/C ×0.5R/B/Y × 2
- Rock×1
- Ghost×1
- Dragon×1
- Dark×1
- Steel×1
- Gold, Silver & Crystal: 2 weaknesses and 4 resistances out of 17 types. Defence ratio 1 : 2 (50%).
- Red, Blue & Yellow: 3 weaknesses and 3 resistances out of 15 types. Defence ratio 1 : 1 (100%).
- This Pokémon has one less weakness and one more resistance in GSC than in RBY. So this Pokémon has a better defense ratio in GSC.
Offence: same-type attacks against each type
- NormalNormal
- FireNormal
- WaterNormal
- ElectricNormal
- GrassGood
- IceNormal
- FightingNormal
- PoisonBad
- GroundBad
- Normal
- PsychicNormal
- BugG/S/C NormalR/B/Y Good
- RockBad
- GhostBad
- DragonNormal
- DarkNormal
- SteelNo Effect
- Gold, Silver & Crystal: 1 advantage and 5 disadvantages out of 17 types. Offensive ratio 1:5 (20%).
- Red, Blue & Yellow: 2 advantages and 4 disadvantages out of 15 types. Offensive ratio 1:2 (50%).
Moves learned by levelling up
| Yellow | R/B | G/S/C | Move | Type | Kind |
|---|---|---|---|---|---|
| 30 | Start | Start | Poison Gas | Poison | Status |
| Start | Start | Start | Pound | Normal | Physical |
| 45 | 45 | 33 | Harden | Normal | Status |
| Start | Start | 37 | Disable | Normal | Status |
| 37 | Start | 45 | Sludge | Poison | Physical |
| 33 | Start | 45 | Minimize | Normal | Status |
| 53 | 53 | 45 | Screech | Normal | Status |
| 60 | 60 | 45 | Acid Armor | Poison | Status |
| — | — | 60 | Sludge Bomb | Poison | Physical |
“Start” means it knows the move from level 1; a dash means it doesn’t learn the move by levelling up in that game.
Move Tutor Crystal
- Flamethrower, Thunderbolt
TMs & HMs Gold, Silver & Crystal
- TM01Dynamicpunch
- TM03Curse
- TM06Toxic
- TM07Zap Cannon
- TM10Hidden Power
- TM11Sunny Day
- TM13Snore
- TM15Hyper Beam
- TM17Protect
- TM19Giga Drain
- TM20Endure
- TM21Frustration
- TM25Thunder
- TM27Return
- TM32Double Team
- TM33Ice Punch
- TM34Swagger
- TM35Sleep Talk
- TM36Sludge Bomb
- TM38Fire Blast
- TM41Thunderpunch
- TM44Rest
- TM45Attract
- TM46Thief
- TM48Fire Punch
TMs & HMs Red, Blue & Yellow
- TM06Toxic
- TM08Body Slam
- TM15Hyper Beam
- TM20Rage
- TM21Mega Drain
- TM24Thunderbolt
- TM25Thunder
- TM31Mimic
- TM32Double Team
- TM34Bide
- TM36Self Destruct
- TM38Fire Blast
- TM44Rest
- TM47Explosion
- TM50Substitute
Breeding Gold, Silver & Crystal
| Egg groups | Indeterminate Pokémon group 6 |
|---|
Compatible Pokémon
Egg moves
| Move | How to pass it down |
|---|---|
| Haze | Mate with a male Koffing/Weezing. |
| Lick | Mate with a male from Gastly Family. |
| Mean Look | Mate with a male from Gastly Family, or Misdreavus. |
Stats
| Stat | Base | Range at Lv. 100 | G/S/C rank | R/B/Y rank |
|---|---|---|---|---|
| HP | 105 | 383-413 | 10/4589.41% | 7/4291.92% |
| Attack | 105 | 278-308 | 7/4989.41% | 7/4588.49% |
| Defense | 75 | 218-248 | 22/5557.93% | 19/4459.86% |
| Speed | 50 | 168-198 | 34/4727.43% | 31/4222.70% |
| Special Attack G/S/C | 65 | 198-228 | 23/4648.01% | — |
| Special Defense G/S/C | 100 | 268-298 | 11/4187.46% | — |
| Special R/B/Y | 65 | 198-228 | — | 16/2944.05% |
| Total | 500 G/S/C 400 R/B/Y |
1513-1693 1245-1395 |
14/8781.59% | 18/6574.19% |
Ranges are the lowest and highest the stat can be at level 100. Ranks compare the base stat with every other Pokémon in those games (1 is the highest), with its percentile underneath.
Restored from Gengar’s Online Pokédex v4.2, one of the first Pokédexes on the web, created by Curtis Alumbaugh (Gengar) with Ian Alumbaugh (Haunter) and kept by Pokémon Dungeon. How to read this page · Red, Blue & Yellow moves · The Library