Koffing: Stats, Moves, Weakness & Evolution

Base stats

HP40115–147190–284

Atk6576–128121–251

Def95103–161175–317

SpA6072–123112–240

SpD4558–10685–207

Spe3549–9567–185

Total340Higher than 29% of Pokémon

Ranges in Pokémon Champions at Lv 50: 0 Stat Points with a −10% Stat Alignment to 32 Stat Points with a +10% one (HP has no alignment).Ranges in the main games at Lv 100: 0 IV/EV with a hindering nature to 31 IV/252 EV with a helpful nature. EV yield: 1 Def.

Stat calculatorChampions Stat Points & Stat Alignment, or EVs, IVs & nature

Calculate damage →

Type matchups

Weak to

2×

GroundPsychic

Resists

½×

BugFairyFightingGrassPoison

Takes normal damage from 11 types

NormalFlyingRockGhostSteelFireWaterElectricIceDragonDark

With : Ground becomes 0×

Speed tiers

The faster Pokémon moves first each turn, so knowing who you outspeed decides a lot of battles. These are its Speed values at Lv 50 in Pokémon Champions (base Speed 35); Scarf and Tailwind use the Max+ value.

Max+95Max87No SP55Min49Scarf142Tailwind190

At max Speed, Koffing outspeeds 8 of the 30 most used Pokémon in Champions VGC on Showdown, and ties 1.

Speed at Lv 50 in Pokémon Champions: Koffing against the 30 most used Pokémon in Champions VGC on Showdown, fastest first
Speed		Pokémon
203		Mega Garchomp ZModest · 32 SP · #21 on Showdown
200		Mega GengarTimid · 32 SP · #26 on Showdown
190		Mega Raichu YTimid · 23 SP · #13 on Showdown
189		Mega SalamenceTimid · 32 SP · #4 on Showdown
184		WhimsicottTimid · 32 SP · #23 on Showdown
178		Mega MetagrossJolly · 32 SP · #28 on Showdown
178		Mega StaraptorJolly · 32 SP · #29 on Showdown
172		SneaslerAdamant · 32 SP · #2 on Showdown
169		Mega FloetteTimid · 32 SP · #17 on Showdown
169		GarchompJolly · 32 SP · #19 on Showdown
167		Mega Charizard YTimid · 32 SP · #14 on Showdown
167		Mega GardevoirTimid · 32 SP · #20 on Showdown
161		IndeedeeTimid · 32 SP · #30 on Showdown
156		Hisuian ArcanineJolly · 32 SP · #16 on Showdown
150		ArchaludonTimid · 32 SP · #9 on Showdown
149		GholdengoTimid · 32 SP · #8 on Showdown
143		BasculegionJolly · 32 SP · #6 on Showdown
128		PelipperTimid · 32 SP · #12 on Showdown
120		VolcaronaBold · 0 SP · #25 on Showdown
105		RillaboomAdamant · 0 SP · #1 on Showdown
101		MiloticCalm · 0 SP · #15 on Showdown
95		Koffing · Max+32 SP, Speed-raising alignment
95		SylveonModest · 15 SP · #18 on Showdown
94		Female IndeedeeRelaxed · 0 SP · #7 on Showdown
90		PolitoedCalm · 0 SP · #22 on Showdown
90		SinistchaBold · 0 SP · #24 on Showdown
87		Koffing · Max32 SP, neutral alignment
85		ArmarougeQuiet · 0 SP · #27 on Showdown
80		IncineroarCareful · 0 SP · #3 on Showdown
80		FarigirafBold · 0 SP · #11 on Showdown
70		KingambitAdamant · 0 SP · #5 on Showdown
60		Mega GolisopodAdamant · 0 SP · #10 on Showdown
55		Koffing · No SP0 SP, neutral alignment

Smogon · Showdown Others at their most common Speed investment in Champions VGC (Reg M-C · Doubles, Sep 2026); Pokémon holding a Mega Stone are shown as their Mega.

Abilities

This Pokémon is to Ground; Gravity/Ingrain/Smack Down/Iron Ball nullify it.
Everything about Levitate →
Other Pokémon with Levitate 34
Gastly Haunter Weezing Misdreavus Unown Vibrava Flygon Lunatone Solrock Baltoy Claydol Duskull Chimecho Latias Latios Mismagius Chingling Bronzor Bronzong Mega Garchomp Z Carnivine Rotom Uxie Mesprit Azelf Origin Giratina Cresselia Tynamo Eelektrik Eelektross Cryogonal Hydreigon Mega Delphox Vikavolt
While this Pokémon is active, Abilities have no effect.
Everything about Neutralizing Gas →
Other Pokémon with Neutralizing Gas 1
Weezing
This Pokémon's attacks without a chance to gain a 10% chance to flinch.
Everything about Stench →
Other Pokémon with Stench 8
Gloom Grimer Muk Weezing Stunky Skuntank Trubbish Garbodor

Competitive

Smogon · Showdown On Showdown

Sep 2026

Other Showdown formats Scarlet & Violet, with Tera

SV SinglesLC

1.4% of teams · rank #40 · Singles, first stages at Lv 5 · 1630 weighting · 7,479 battles · Sep 2026

Most common build

Item: Eviolite
Ability
Nature: Modest
EVs: 36 HP / 156 Def / 196 SpA / 76 Spe
Tera Type: Water

Each part is the most used on its own, so not every team runs this exact set.

Usage by rating

All games2.1%
1500 weighting1.6%
1630 weighting1.4%
1760 weighting2.6%

Usage by month

Oct 20251.4%

Moves

Items

Eviolite97.0%
Leftovers1.3%
Choice Scarf1.3%
Eject Button0.2%
No item0.1%
Red Card0.1%

Abilities

86.4%
13.6%
0%

EV spreads

Modest 36 HP / 156 Def / 196 SpA / 76 Spe80.1%
Modest 156 Def / 196 SpA / 156 SpD4.6%
Bold 236 Def / 116 SpA / 156 SpD2.4%
Bold 76 Def / 196 SpA / 76 SpD / 156 Spe2.1%
Modest 36 HP / 156 Def / 116 SpA / 156 Spe1.4%

Tera types

Water52.2%
Fairy31.7%
Steel5.6%
Dark4.1%

Common teammates

Vullaby51.7%
Mienfoo46.4%
Chinchou45.5%
Mudbray41.4%
Toedscool39.9%
Tinkatink36.7%
Turtwig33.2%
Munchlax30.3%

Evolution

#0109KoffingPoison
1. Level 35
  #0110WeezingPoison
2. Level 35
  #0110Galarian WeezingPoisonFairy

Moves

Level up 15


1	Poison GasPoisons the foe(s).	Poison	Status	—	90%	40
1	TackleNo additional effect.	Normal	Phys	40	100%	35
4	Smog40% chance to poison the target.	Poison	Spec	30	70%	20
8	SmokescreenLowers the target's accuracy by 1.	Normal	Status	—	100%	20
12	Clear SmogResets all of the target's stat stages to 0.	Poison	Spec	50	—	15
16	AssurancePower doubles if target was damaged this turn.	Dark	Phys	60	100%	10
20	Sludge30% chance to poison the target.	Poison	Spec	65	100%	20
24	HazeEliminates all stat changes.	Ice	Status	—	—	30
28	Self-DestructHits adjacent Pokémon. The user faints.	Normal	Phys	200	100%	5
32	Sludge Bomb30% chance to poison the target.	Poison	Spec	90	100%	10
36	ToxicBadly poisons the target. Poison types can't miss.	Poison	Status	—	90%	10
40	BelchCannot be selected until the user eats a Berry.	Poison	Spec	120	90%	10
44	ExplosionHits adjacent Pokémon. The user faints.	Normal	Phys	250	100%	5
48	MementoLowers target's Attack, Sp. Atk by 2. User faints.	Dark	Status	—	100%	10
52	Destiny BondIf an opponent knocks out the user, it also faints.	Ghost	Status	—	—	5

TM / HM / TR 34


TM01	Take DownHas 1/4 recoil.	Normal	Phys	90	85%	20
TM06	Scary FaceLowers the target's Speed by 2.	Normal	Status	—	100%	10
TM07	ProtectPrevents moves from affecting the user this turn.	Normal	Status	—	—	10
TM13	Acid Spray100% chance to lower the target's Sp. Def by 2.	Poison	Spec	40	100%	20
TM16	Psybeam10% chance to confuse the target.	Psychic	Spec	65	100%	20
TM18	ThiefIf the user has no item, it steals the target's.	Dark	Phys	60	100%	25
TM25	FacadePower doubles if user is burn/poison/paralyzed.	Normal	Phys	70	100%	20
TM45	VenoshockPower doubles if the target is poisoned.	Poison	Spec	65	100%	10
TM47	EndureUser survives attacks this turn with at least 1 HP.	Normal	Status	—	—	10
TM49	Sunny DayFor 5 turns, intense sunlight powers Fire moves.	Fire	Status	—	—	5
TM50	Rain DanceFor 5 turns, heavy rain powers Water moves.	Water	Status	—	—	5
TM66	Body Slam30% chance to paralyze the target.	Normal	Phys	85	100%	15
TM70	Sleep TalkUser must be asleep. Uses another known move.	Normal	Status	—	—	10
TM85	RestUser sleeps 2 turns and restores HP and status.	Psychic	Status	—	—	5
TM87	TauntTarget can't use status moves its next 3 turns.	Dark	Status	—	100%	20
TM91	Toxic SpikesPoisons grounded foes on switch-in. Max 2 layers.	Poison	Status	—	—	20
TM94	Dark Pulse20% chance to make the target flinch.	Dark	Spec	80	100%	15
TM102	Gunk Shot30% chance to poison the target.	Poison	Phys	120	80%	5
TM103	SubstituteUser takes 1/4 its max HP to put in a substitute.	Normal	Status	—	—	10
TM107	Will-O-WispBurns the target.	Fire	Status	—	85%	15
TM114	Shadow Ball20% chance to lower the target's Sp. Def by 1.	Ghost	Spec	80	100%	15
TM125	Flamethrower10% chance to burn the target.	Fire	Spec	90	100%	15
TM126	Thunderbolt10% chance to paralyze the target.	Electric	Spec	90	100%	15
TM141	Fire Blast10% chance to burn the target.	Fire	Spec	110	85%	5
TM148	Sludge Bomb30% chance to poison the target.	Poison	Spec	90	100%	10
TM166	Thunder30% chance to paralyze. Can't miss in rain.	Electric	Spec	110	70%	10
TM171	Tera BlastIf Terastallized: Phys. if Atk > SpA, type = Tera.	Normal	Spec	80	100%	10
TM174	HazeEliminates all stat changes.	Ice	Status	—	—	30
TM175	ToxicBadly poisons the target. Poison types can't miss.	Poison	Status	—	90%	10
TM177	SpiteLowers the PP of the target's last move by 4.	Ghost	Status	—	100%	10
TM180	Gyro BallMore power the slower the user than the target.	Steel	Phys	—	100%	5
TM202	Pain SplitShares HP of user and target equally.	Normal	Status	—	—	20
TM214	Sludge Wave10% chance to poison adjacent Pokémon.	Poison	Spec	95	100%	10
TM224	CurseCurses if Ghost, else -1 Spe, +1 Atk, +1 Def.	Ghost	Status	—	—	10

Egg moves 6


Egg	CurseCurses if Ghost, else -1 Spe, +1 Atk, +1 Def.	Ghost	Status	—	—	10
Egg	Pain SplitShares HP of user and target equally.	Normal	Status	—	—	20
Egg	Spit UpMore power with more uses of Stockpile.	Normal	Spec	—	100%	10
Egg	SpiteLowers the PP of the target's last move by 4.	Ghost	Status	—	100%	10
Egg	StockpileRaises user's Defense, Sp. Def by 1. Max 3 uses.	Normal	Status	—	—	20
Egg	SwallowHeals the user based on uses of Stockpile.	Normal	Status	—	—	10

Biology

It mixes its toxins with the rotting trash it eats to make poisonous gases. Sometimes, it can over-inflate itself and explode.

Design & origin

Koffing is based on air pollution and meteorites.

Adapted from Wikipedia: List of generation I Pokémon · CC BY-SA 4.0 · edited.

Polls & views

Official vote, Japan#580 of 720 in the 2016 Pokémon General Election 720 (Japan), tiedOfficial results, via Cinematoday

Each line is one source, as it published it. Polls counted every form under its species.

Pokédex entries

: Poison Gas Pokémon
: Kanto · Red & Green (JP)
Color: Purple

: Urban
Pal Park area: Mountain

Kanto#109Original Johto#114Original Hoenn#108Updated Johto#115Updated Unova#046New Hoenn#113Let’s Go Kanto#109Galar#250Kitakami#135

It adores polluted air. Some claim that Koffing used to be more plentiful in the Galar region than they are now.
Shield
Its body is full of poisonous gas. It floats into garbage dumps, seeking out the fumes of raw, rotting trash.
Sword
Toxic gas is held within its thin, balloon-shaped body, so it can cause massive explosions.
Black 2 · White 2
Lighter-than-air gases in its body keep it aloft. The gases not only smell, they are also explosive.
Diamond · Pearl · Platinum · Black · White · Y
Its thin, balloon-like body is inflated by horribly toxic gases. It reeks when it is nearby.
FireRed · X
Getting up close to a KOFFING will give you a chance to observe, through its thin skin, the toxic gases swirling inside. It blows up at the slightest stimulation.
Emerald
KOFFING embodies toxic substances. It mixes the toxins with raw garbage to set off a chemical reaction that results in a terribly powerful poison gas. The higher the temperature, the more gas is concocted by this Pokémon.
Sapphire · Alpha Sapphire
If KOFFING becomes agitated, it raises the toxicity of its internal gases and jets them out from all over its body. This Pokémon may also overinflate its round body, then explode.
Ruby · Omega Ruby
If one gets close enough to it when it expels poison ous gas, the gas swirling inside it can be seen.
Crystal
The poisonous gases it contains are a little bit lighter than air, keeping it slightly airborne.
Silver · SoulSilver
Its thin, filmy body is filled with gases that cause constant sniffles, coughs and teary eyes.
Gold · HeartGold
In hot places, its internal gases could expand and explode without any warning. Be very careful!
Yellow · Let’s Go, Pikachu! · Let’s Go, Eevee!
Because it stores several kinds of toxic gases in its body, it is prone to exploding without warning.
Red · Blue · LeafGreen

Names around the world

English: Koffing
Japanese: ドガース
Japanese (romaji): Dogars
Korean: 또가스
Chinese (Traditional): 瓦斯彈
Chinese (Simplified): 瓦斯弹
French: Smogo
German: Smogon
Spanish: Koffing
Italian: Koffing

Sprites

Artwork and 3D models

Gen IX · Gen VIII · Gen VII · Gen VI

Generation V

Generation IV

Generation III

Generation II

Generation I

Training

: 1 Def
: 190 ≈24.8% with a Poké Ball at full HP
: 70
: 68
: Medium

Breeding

: Amorphous
: ♂ 50%♀ 50%
: 20 egg cycles ≈5,355 steps (Gen IV–VII)

Where to find

Green 4 areas

Pokemon Mansion (1F)Walking in tall grass or a cave · Lv 30
Pokemon Mansion (2F)Walking in tall grass or a cave · Lv 30
Pokemon Mansion (3F)Walking in tall grass or a cave · Lv 34
Pokemon Mansion (B1F)Walking in tall grass or a cave · Lv 35

Red 4 areas

Pokemon Mansion (1F)Walking in tall grass or a cave · Lv 30–32
Pokemon Mansion (2F)Walking in tall grass or a cave · Lv 30–34
Pokemon Mansion (3F)Walking in tall grass or a cave · Lv 31–35
Pokemon Mansion (B1F)Walking in tall grass or a cave · Lv 31–33

Shield 11 areas

Dusty BowlWalking in the overworld · Lv 42–60
East Lake Axewell (Max Den D)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 15–30
Giant's Cap (Max Den A)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 15–50
Giant's Mirror (Area 2)Walking in the overworld · Lv 42–60
Giant's Mirror (Main Area)Walking in tall grass or a cave · Lv 26–60
Hammerlocke Hills (Max Den F)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 35–50
Motostoke OutskirtsWalking in the overworld · Lv 22–26
Motostoke RiverbankWalking in the overworld · Lv 28–60
Motostoke Riverbank (Max Den D)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 15–50
North Lake Miloch (Max Den C)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 15–30
North Lake Miloch (Max Den D)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 15–30

Sword 11 areas

Dusty BowlWalking in the overworld · Lv 42–60
East Lake Axewell (Max Den D)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 15–30
Giant's Cap (Max Den A)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 15–50
Giant's Mirror (Area 2)Walking in the overworld · Lv 42–60
Giant's Mirror (Main Area)Walking in tall grass or a cave · Lv 26–60
Hammerlocke Hills (Max Den F)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 35–50
Motostoke OutskirtsWalking in the overworld · Lv 22–26
Motostoke RiverbankWalking in the overworld · Lv 26–60
Motostoke Riverbank (Max Den D)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 15–50
North Lake Miloch (Max Den C)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 15–30
North Lake Miloch (Max Den D)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 15–30

Let’s Go, Eevee! 5 areas

Pokemon Mansion (1F)Walking in the overworld · Lv 39–44
Pokemon Mansion (2F)Walking in the overworld · Lv 39–44
Pokemon Mansion (3F)Walking in the overworld · Lv 39–44
Pokemon Mansion (B1F)Walking in the overworld · Lv 39–44
Power PlantWalking in the overworld · Lv 37–42

Omega Ruby 1 area

Fiery PathEncountering 5 Pokemon within grass, flowers, or within a cave · Lv 8

White 2 1 area

Virbank Complex (inner)Walking in dark grass, Walking in tall grass or a cave · Lv 10–14

Black 2 1 area

Virbank Complex (inner)Walking in dark grass, Walking in tall grass or a cave · Lv 10–14

SoulSilver 4 areas

Burned Tower (1F)Walking in tall grass or a cave · Lv 14–16
Burned Tower (B1F)Walking in tall grass or a cave · Lv 14–16
Safari Zone MarshlandWalking in tall grass or a cave · Lv 15–17
Team Rocket HQStatic encounter · Lv 21

HeartGold 4 areas

Burned Tower (1F)Walking in tall grass or a cave · Lv 14–16
Burned Tower (B1F)Walking in tall grass or a cave · Lv 14–16
Safari Zone MarshlandWalking in tall grass or a cave · Lv 15–17
Team Rocket HQStatic encounter · Lv 21

Platinum 1 area

Stark Mountain main cavernWalking in tall grass or a cave · Lv 53

LeafGreen 5 areas

Celadon CitySurfing · Lv 30–40
Pokemon Mansion (1F)Walking in tall grass or a cave · Lv 28
Pokemon Mansion (2F)Walking in tall grass or a cave · Lv 28
Pokemon Mansion (3F)Walking in tall grass or a cave · Lv 28
Pokemon Mansion (B1F)Walking in tall grass or a cave · Lv 28

FireRed 5 areas

Celadon CitySurfing · Lv 30–40
Pokemon Mansion (1F)Walking in tall grass or a cave · Lv 28–30
Pokemon Mansion (2F)Walking in tall grass or a cave · Lv 28–30
Pokemon Mansion (3F)Walking in tall grass or a cave · Lv 28–30
Pokemon Mansion (B1F)Walking in tall grass or a cave · Lv 28–30

Emerald 1 area

Fiery PathWalking in tall grass or a cave · Lv 15–16

Sapphire 1 area

Fiery PathWalking in tall grass or a cave · Lv 14

Ruby 1 area

Fiery PathWalking in tall grass or a cave · Lv 15–16

Crystal 3 areas

Burned Tower (1F)Walking in tall grass or a cave · Lv 14
Burned Tower (B1F)Walking in tall grass or a cave · Lv 12–16
Team Rocket HQStatic encounter · Lv 21

Silver 3 areas

Burned Tower (1F)Walking in tall grass or a cave · Lv 14–16
Burned Tower (B1F)Walking in tall grass or a cave · Lv 14–16
Team Rocket HQStatic encounter · Lv 21

Gold 3 areas

Burned Tower (1F)Walking in tall grass or a cave · Lv 14–16
Burned Tower (B1F)Walking in tall grass or a cave · Lv 14–16
Team Rocket HQStatic encounter · Lv 21

Blue 4 areas

Pokemon Mansion (1F)Walking in tall grass or a cave · Lv 30
Pokemon Mansion (2F)Walking in tall grass or a cave · Lv 30
Pokemon Mansion (3F)Walking in tall grass or a cave · Lv 34
Pokemon Mansion (B1F)Walking in tall grass or a cave · Lv 35

Red 4 areas

Pokemon Mansion (1F)Walking in tall grass or a cave · Lv 30–32
Pokemon Mansion (2F)Walking in tall grass or a cave · Lv 30–34
Pokemon Mansion (3F)Walking in tall grass or a cave · Lv 31–35
Pokemon Mansion (B1F)Walking in tall grass or a cave · Lv 31–33

Locations cover Red & Blue to Sword & Shield (with its DLC) and Let’s Go. We don’t have them yet for Legends: Arceus, Brilliant Diamond & Shining Pearl, Scarlet & Violet and Legends: Z-A.