Is Koffing Good in Yellow Playthrough?
Not available in Yellow without trading. James uses Koffing as part of Team Rocket in the story, but you can't catch your own. Trade from Red or Blue if you want one.
Brock's typing presses Koffing's defenses.
Koffing trades roughly evenly with Misty's team.
Lt. Surge's typing presses Koffing's defenses.
Koffing trades roughly evenly with Erika's team.
Koffing trades roughly evenly with Koga's team.
Koffing trades roughly evenly with Sabrina's team.
Koffing trades roughly evenly with Blaine's team.
Giovanni's team hits Koffing's weaknesses hard.
Koffing trades roughly evenly with Lorelei's team.
Bruno's team hits Koffing's weaknesses hard.
Agatha's team hits Koffing's weaknesses hard.
Koffing trades roughly evenly with Lance's team.
Koffing trades roughly evenly with Blue's team.
Trade
Koffing cannot be caught in this game. It must be traded in from a compatible game where it appears in the wild. Cross-region trading typically becomes available after defeating the Elite Four.
Recommended Moves
- STARTING (Lv 5)
- LV 5PoisonSmogPower 30Accuracy 70%PP 20
- LV 5NormalTacklePower 35Accuracy 95%PP 35
- After Lt. Surge
- TM24ElectricThunderboltPower 95Accuracy 100%PP 15Prize for defeating Vermilion Gym Leader Lt. Surge
- LV 32PoisonSludgePower 98Accuracy 100%PP 20
- LV 40NormalSelf-DestructPower 130Accuracy 100%PP 5
- LV 48NormalExplosionPower 170Accuracy 100%PP 5
- After Koga
- TM25ElectricThunderPower 120Accuracy 70%PP 10Kanto Power Plant
- After Blaine
- TM38FireFire BlastPower 120Accuracy 85%PP 5Prize for defeating Cinnabar Gym Leader Blaine
How to Get Koffing in Yellow
Yellow stripped Koffing from the wild to follow the anime, where it belonged to Team Rocket. With no encounter anywhere, a trade from Red or Blue is the only way in.
How to Obtain Koffing in Y
- Step 1Koffing ✓CARTRIDGE TRADEfrom Red & BlueAvailableCatch in Red & Blue via Walking · Pokémon Mansion, then trade to the current game via link cable.LATER APPEARANCEfrom Gold & SilverNot TradeableAppears in Gold & Silver via Walking · Burned Tower. Forward-only transfer — no path back to this game from a later one.LATER APPEARANCEfrom CrystalNot TradeableAppears in Crystal via Walking · Burned Tower. Forward-only transfer — no path back to this game from a later one.LATER APPEARANCEfrom Ruby & SapphireNot TradeableAppears in Ruby & Sapphire via Walking · Fiery Path. Forward-only transfer — no path back to this game from a later one.LATER APPEARANCEfrom EmeraldNot TradeableAppears in Emerald via Walking · Fiery Path. Forward-only transfer — no path back to this game from a later one.LATER APPEARANCEfrom FireRed & LeafGreenNot TradeableAppears in FireRed & LeafGreen via Walking · Pokémon Mansion. Forward-only transfer — no path back to this game from a later one.LATER APPEARANCEfrom PlatinumNot TradeableAppears in Platinum via Walking · Stark Mountain. Forward-only transfer — no path back to this game from a later one.
- Step 2Evolve into Weezing
Koffing Weakness
Ground, Psychic, and Bug moves hit Koffing for super-effective damage. Koffing's physical bulk (base 95 Def) helps cushion physical weakness hits, but special attackers are the bigger threat.
| Damage | Types |
|---|---|
| 2x (Weak) | Ground, Psychic, Bug |
| 0.5x (Resist) | Grass, Fighting, Poison |
- Only 15 types exist — Dark, Steel, and Fairy are absent
- Ghost has no effect on Psychic (a known bug, fixed in Gen II)
- Special stat governs both offense and defense — no Sp.Atk / Sp.Def split
What is Koffing Weak Against
VulnerableBest Pokemon Against Koffing
 Mewtwo Psychic | S | |
Obtain MethodCerulean Cave Interact Encounter | ||
 Hypno Psychic | C | |
 Exeggutor GrassPsychic | S | |
 Slowbro WaterPsychic | B | |
Obtain MethodRoute 12 Surfing Available Moves Moves
Damage vs Koffing View Slowbro builds →Psychic 2x134-159%KO Earthquake 2x55-65% | ||
 Kadabra Psychic | B | |
Available Moves Moves
Damage vs Koffing View Kadabra builds →Psychic 2x157-185%KO Dig 2x32-38% | ||
 Venomoth BugPoison | C | |
Available Moves Moves
Damage vs Koffing View Venomoth builds →Psychic 2x82-97% Leech Life 2x16-19% | ||
 Butterfree Bug | C | |
 Parasect BugGrass | C | |
Available Moves Moves
Damage vs Koffing View Parasect builds →Dig 2x67-79% Leech Life 2x22-27% | ||
Koffing Evolutions
You'll evolve Koffing into Weezing the traditional way. This Poison type doesn't breed despite having a chain ahead. The evolved forms gain up to 135 total stats over Koffing. View every chain in the Evolution Chart.
How to Evolve
Y Koffing Best Moveset
95 Defense blocks physical hits on a Poison frame that can't turn that bulk into anything offensive. MoveExplosion exists as the nuclear option, but the framing around it offers nothing else. Weezing takes over the same limited role.
Best Build
Utility Moveset
- Explosion
- Fire Blast
- Sludge
- Thunder
Recommended Teammates
Moves List
Level-up moves are just the starting point for Koffing. TMs unlock Normal and Fire coverage and turn a straightforward STAB kit around Sludge and Smog into something with actual range.
How to Read the Moves Table
Tabs
- Level-Up
- Learned by leveling up.
- TM
- Taught by a Technical Machine.
- 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.
Tier (S to D)
Each move's competitive rank in RankedBoost's system. TM 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 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 12 TMs are obtainable before the Elite Four
Tutor Moves
Base Stats
In hot places, its internal gases could expand and explode without any warning. Be very careful!
Koffing Yellow Guide
Koffing isn't catchable in Yellow. Catch one in Red or Blue, then trade it to Yellow.
In Yellow, Koffing has 355 BST and evolves into Weezing. Compare the two forms before you give either one a team slot.
In Yellow, use Koffing as a balanced. Physical side carries the damage. It's slow, so Trick Room or priority moves are key. Sludge is the primary attack.
Game Availability
One of the original 151, Koffing has appeared in 20 games: most mainline games. From Red & Blue through the latest titles, it's rarely been left out of a regional Pokedex.
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 7SM
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
Explore
Where to go next after Koffing.
Keep playing · YellowYellow Tier ListThe best Pokemon ranked tier by tierSee Yellow Tier List