#0109 | Koffing

Poison

Where to Find Koffing

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Generation 1

Red

Pokémon Mansion

Blue

Pokémon Mansion

Yellow

Generation 2

Gold

Burned Tower

Team Rocket HQ (Seven)

Silver

Burned Tower

Team Rocket HQ (Seven)

Crystal

Burned Tower

Team Rocket HQ (Seven)

Generation 3

Ruby

Fiery Path

Sapphire

Fiery Path

Emerald

Fiery Path

Fire Red

Pokémon Mansion

Celadon City (surfing)

Leaf Green

Pokémon Mansion

Celadon City (surfing)

Generation 4

Diamond

Breed Weezing

Pearl

Breed Weezing

Platinum

Stark Mountain

Heart Gold

Burned Tower

Safari Zone (tall grass in Marshland, default)

Team Rocket HQ (Five)

Soul Silver

Burned Tower

Safari Zone (tall grass in Marshland, default)

Team Rocket HQ (Five)

Generation 5

Black

White

Black 2

Virbank Complex

White 2

Virbank Complex

Generation 6

Omega Ruby

Fiery Path

Alpha Sapphire

Fiery Path

Generation 7

Sun

Moon

Ultra Sun

Ultra Moon

Let's Go Pikachu

Let's Go Eevee

Power Plant, Pokémon Mansion

Generation 8

Sword

Dusty Bowl, Giant’s Mirror, Motostoke Outskirts, Motostoke Riverbank

East Lake Axewell, Giant’s Cap, Hammerlocke Hills, Motostoke Riverbank, North Lake Miloch (Max Raid Battle)

Shield

Dusty Bowl, Giant’s Mirror, Motostoke Outskirts, Motostoke Riverbank

East Lake Axewell, Giant’s Cap, Hammerlocke Hills, Motostoke Riverbank, North Lake Miloch (Max Raid Battle)

Brilliant Diamond

Breed Weezing

Shining Pearl

Breed Weezing

Legends Arceus

Generation 9

Scarlet

The Hidden Treasures of Area Zero DLC:

Oni Mountain, Infernal Pass, Crystal Pool

Violet

The Hidden Treasures of Area Zero DLC:

Oni Mountain, Infernal Pass, Crystal Pool

Koffing Evolution Tree

#0109 Koffing

Poison

Level 35

Level up in Galar for Galarian Weezing

#0110 Weezing

Poison