Koffing
Red/Blue

Because it stores several kinds of toxic gases in its body, it is prone to exploding without warning.

Yellow

In hot places, its internal gases could expand and explode without any warning. Be very careful!

Evolution Chain

koffing
Koffing
Level 35
weezing
Weezing

Pokédex & Training Data

Classification Poison Gas Pokémon
Height 0.6 m (1'12")
Weight 1.0 kg (2.2 lbs)
Abilities N/A in Gen I
EV Yield +1 defense
Catch Rate 190
Base Friendship 70
Growth Rate medium

Pokédex Numbers

Kanto (R/B/Y) #109
Johto (G/S/C) #114
Hoenn (R/S/E) #108
Johto (HG/SS) #115
Unova (B2/W2) #046
Hoenn (OR/AS) #113
Galar (Sw/Sh) #250
National #109
Kitakami #135

Held Items

None in this generation.

Game Locations

Pokemon Mansion 1f
Pokemon Mansion 2f
Pokemon Mansion 3f
Pokemon Mansion B1f

Learned Moves

Level Up Moves

Red/Blue
Lvl Name Class Power Acc. PP Effect
1 Tackle
40 100% 35 Inflicts regular damage with no additional effect.
1 Smog
30 70% 20 Has a 40% chance to poison the target.
32 Sludge
65 100% 20 Has a 30% chance to poison the target.
37 Smokescreen
— 100% 20 Lowers the target’s accuracy by one stage.
40 Self Destruct
200 100% 5 User faints.
45 Haze
— — 30 Resets all Pokémon’s stats, accuracy, and evasion.
48 Explosion
250 100% 5 User faints.
Yellow
Lvl Name Class Power Acc. PP Effect
1 Tackle
40 100% 35 Inflicts regular damage with no additional effect.
1 Smog
30 70% 20 Has a 40% chance to poison the target.
32 Sludge
65 100% 20 Has a 30% chance to poison the target.
37 Smokescreen
— 100% 20 Lowers the target’s accuracy by one stage.
40 Self Destruct
200 100% 5 User faints.
45 Haze
— — 30 Resets all Pokémon’s stats, accuracy, and evasion.
48 Explosion
250 100% 5 User faints.

TM/HM Moves

Red/BlueYellow
Name Class Power Acc. PP Effect
TM06 Toxic
— 90% 10 Badly poisons the target, inflicting more damage every turn.
TM20 Rage
20 100% 20 If the user is hit after using this move, its Attack rises by one stage.
TM24 Thunderbolt
90 100% 15 Has a 10% chance to paralyze the target.
TM25 Thunder
110 70% 10 Has a 30% chance to paralyze the target.
TM31 Mimic
— — 10 Copies the target’s last used move.
TM32 Double Team
— — 15 Raises the user’s evasion by one stage.
TM34 Bide
— — 10 User waits for two turns, then hits back for twice the damage it took.
TM36 Self Destruct
200 100% 5 User faints.
TM38 Fire Blast
110 85% 5 Has a 10% chance to burn the target.
TM44 Rest
— — 5 User sleeps for two turns, completely healing itself.
TM47 Explosion
250 100% 5 User faints.
TM50 Substitute
— — 10 Transfers 1/4 of the user’s max HP into a doll, protecting the user from further damage or status changes until it breaks.

Base Stats

Hp 40
Attack 65
Defense 95
Sp. Atk 60
Sp. Def 45
Speed 35
Total 340

Type Defenses

(vs. Gen 6+ rules)

0.5x
0.5x
0.5x
2x
2x
0.5x
0.5x