Type: Poison
Height: 6'7" Weight: 15 lbs.
Appears at: Routes 4, 8, 9, 10, 11, 23
Desrciption: Moves silently and stealthily and eats the eggs of birds such as Pidgey and Spearow whole.
Evolves into: Arbok at Lvl 22
Learned Skills:
Level Skill Type
----- Wrap Normal
----- Leer Normal
LV 10 Poison Sting Poison
LV 17 Bite Normal
LV 24 Glare Normal
LV 31 srceech Normal
LV 38 Acid Poison
TMs: 06, 08, 09, 10, 20, 21, 26, 27, 28, 31, 32, 34, 40, 44, 48, 50
HMs: 04
Advice: The only really annoying thing an Ekans has to offer is Poison Sting and Wrap.

Type: Poison
Height: 11'6" Weight: 143 lbs.
Appears at: Routes 23 and Unknown Dungeon
Desrciption: It's rumored that the feracious warning markings on its belly differ from area to area.
Evolves into: N/A
Learned Skills:
Level Skill Type
----- Wrap Normal
----- Leer Normal
----- Poison Sting Poison
LV 17 Bite Normal
LV 27 Glare Normal
LV 36 srceech Normal
LV 47 Acid Poison
TMs: 06, 08, 09, 10, 15, 20, 21, 26, 27, 28, 31, 32, 34, 40, 44, 48, 50
HMs: 04
Advice: Feh.

Type: Poison
Height: 1'4" Weight: 15 lbs.
Appears at: Route 22 and the Safari Zone
Desrciption: Although small, its venomous barb render this Pokemon dangerous. The female was smaller horns.
Evolves into: Nidorina at LV 16, Nidoqueen with Moon Stone.
Learned Skills:
Level Skill Type
----- Growl Normal
----- Tackle Normal
LV 08 srcatch Normal
LV 14 Poison Sting Poison
LV 21 Tail Whip Normal
LV 29 Bite Normal
LV 36 Fury Swipes Normal
LV 43 Double Kick Fighting
TMs: 06, 08, 09, 10, 14, 20, 24, 25, 31, 32, 33, 34, 40, 44, 50
HMs: N/A
Advice: Not tough, but elusive at times.

Type: Poison
Height: 2'7" Weight: 44 lbs.
Appears at: Safari Zone; Coin Exchange (Celadon City)
Desrciption: The female's horn develops slowly. Prefers physical attacks such as clawing and biting.
Evolves into: Nidoqueen with Moon Stone
Learned Skills:
Level Skill Type
----- Growl Normal
----- Tackle Normal
----- srcatch Normal
LV 14 Poison Sting Poison
LV 23 Tail Whip Normal
LV 32 Bite Normal
LV 41 Fury Swipes Normal
LV 50 Double Kick Fighting
TMs: 06, 07, 08, 09, 10, 11, 12, 13, 14, 20, 24, 25, 31, 32, 33, 34, 40, 44, 50
HMs: N/A
Advice: Feh.

Type: Poison/Ground
Height: 4'3" Weight: 132 lbs.
Appears at: N/A
Desrciption: Its hard scales provide strong protection, and it uses its hefty bulk to execute powerful moves.
Evolves into: N/A
Learned Skills:
Level Skill Type
----- Growl Normal
----- Tackle Normal
----- srcatch Normal
----- Tail Whip Normal
LV 14 Poison Sting Poison
LV 23 Body Slam Normal
TMs: 01, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 24, 25, 26, 27, 31, 32, 33, 34, 38, 40, 44, 48, 50
HMs: 03, 04
Advice: Giovanni has one at about 43rd level. You'll have quite the fight on your hands if you aren't prepared.

Type: Poison
Height: 1'8" Weight: 20 lbs.
Appears at: Route 22 and the Safari Zone
Desrciption: Stiffens its ears to sense danger. The larger its horns, the more powerful its secreted venom.
Evolves into: Nidorino at Lvl 16, Nidoking with Moon Stone
Learned Skills:
Level Skill Type
----- Leer Normal
----- Tackle Normal
LV 08 Horn Attack Normal
LV 14 Poison Sting Poison
LV 21 Focus Energy Normal
LV 29 Fury Attack Normal
LV 36 Horn Drill Normal
LV 43 Double Kick Fighting
TMs: 06, 07, 08, 09, 10, 14, 20, 24, 25, 31, 32, 33, 34, 40, 44, 50
HMs: N/A
Advice: Treat it like a Nidoran Female, but a touch more dangerous.

Type: Poison
Height: 2'11" Weight: 43 lbs.
Appears at: Safari Zone; Coin Exchange (Celadon City)
Desrciption: An aggressive Pokemon that is quick to attack. The horn on its head secretes a powerful venom.
Evolves into: Nidoking with Moon Stone
Learned Skills:
Level Skill Type
----- Leer Normal
----- Tackle Normal
LV 08 Horn Attack Normal
LV 14 Poison Sting Poison
LV 21 Focus Energy Normal
LV 29 Fury Attack Normal
LV 36 Horn Drill Normal
LV 43 Double Kick Fighting
TMs: 06, 07, 08, 09, 10, 11, 12, 13, 14, 20, 24, 25, 31, 32, 33, 34, 40, 44, 50
HMs: N/A
Advice: Yeah, like you need help by now.

Type: Poison
Height: 4'7" Weight: 137 lbs.
Appears at: N/A
Desrciption: It uses its powerful tail in battle to smash, constrict, then break its prey's bones.
Evolves into: N/A
Learned Skills:
Level Skill Type
----- Tackle Normal
----- Horn Attack Normal
----- Poison Sting Poison
LV 23 Thrash Normal
TMs: 01, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 24, 25, 26, 27, 31, 32, 33, 34, 38, 40, 44, 48, 50
HMs: 03, 04
Advice: Eh. You'll have to turn to a friend to fight one.

Type: Poison/Flying
Height: 2'7" Weight: 17 lbs.
Appears at: Mt. Moon, Rock Tunnel, Seafoam Islands, and Victory Road.
Desrciption: Forms colonies in perpetually dark places and uses ultra-sonic waves to identify and approach targets.
Evolves into: Golbat at Lvl 22
Learned Skills:
Level Skill Type
----- Leach Life Bug
LV 10 Supersonic Normal
LV 15 Bite Normal
LV 21 Confuse Ray Ghost
LV 28 Wing Attack Flying
LV 36 Haze Ice
TMs: 02, 04, 06, 09, 10, 20, 21, 31, 32, 34, 44, 50
HMs: N/A
Advice: Save for when it's strong enough to use Confuse Ray, it's not a very tough opponent. Beware of it's annoying Supersonic attack, though.

Type: Poison Flying
Height: 5'3" Weight: 121 lbs.
Appears at: Seafoam Islands, Victory Road and Unknown Dungeon
Desrciption: Once it strikes, it won't stop draining energy from the victim even if it gets too heavy to fly.
Evolves into: N/A
Learned Skills:
Level Skill Type
----- Leach Life Bug
----- Supersonic Normal
----- Bite Normal
LV 21 Confuse Ray Ghost
LV 28 Wing Attack Flying
LV 36 Haze Ice
TMs: 02, 04, 06, 09, 10, 20, 21, 31, 32, 34, 44, 50
HMs: N/A
Advice: Most will use Wing Attack or Confuse Ray. It's the latter that you must beware.

Type: Poison
Height: 2'11" Weight: 66 lbs.
Appears at: Pokemon House on Cinnabar Island
Desrciption: Appears in filthy areas and thrives by sucking up polluted sludge that is pumped out of factories.
Evolves into: Muk at Lvl 38
Learned Skills:
Level Skill Type
----- Pound Normal
----- Disable Normal
LV 30 Poison Gas Poison
LV 33 Minimize Normal
LV 37 Sludge Poison
LV 42 Harden Normal
LV 48 srceech Normal
LV 55 Acid Armor Poison
TMs: 06, 08, 20, 21, 24, 25, 31, 32, 34, 36, 38, 44, 47, 50
HMs: N/A
Advice: Carry a LOT of antidotes.

Type: Poison
Height: 3'11" Weight: lbs.
Appears at: Pokemon House at Cinnabar Island
Desrciption: Thickly covered with a filthy, vile sludge. It is so toxic, even its footprints contain poison.
Evolves into: N/A
Learned Skills:
Level Skill Type
----- Pound Normal
----- Disable Normal
----- Poison Gas Poison
----- Minimize Normal
----- Sludge Poison
LV 42 Harden Normal
LV 48 srceech Normal
LV 55 Acid Armor Poison
TMs: 06, 08, 15, 20, 21, 24, 25, 31, 32, 34, 36, 38, 44, 47, 50
HMs: N/A
Advice: Carry a lot of potions and antidotes. It'll use it's Sludge attack and that's actually very devastating.

Type: Poison
Height: 2'0" Weight: 2 lbs.
Appears at: Pokemon House at Cinnabar Island
Desrciption: Because it stores several kinds of toxic gases in its body, the Koffing is prone to exploding without warning.
Evolves into: Weezing at Lvl 35
Learned Skills:
Level Skill Type
----- Tackle Normal
----- Smog Poison
LV 32 Sludge Poison
LV 37 Smokesrceen Normal
LV 40 Self Destruct Normal
LV 45 Haze Ice
LV 48 Explosion Normal
TMs: 06, 20, 24, 25, 31, 32, 34, 36, 38, 44, 47, 50
HMs: N/A
Advice: It's Smog and Sludge attacks are more dangerous than it's other attacks. (With, of course, the exception of Self Destruct and Explosion)

Type: Poison
Height: 3'11" Weight: 21 lbs.
Appears at: Pokemon House at Cinnabar Island
Desrciption: Where two kinds of poison gases meet, two Koffings can fuse into a Weezing over many years.
Evolves into: N/A
Learned Skills:
Level Skill Type
----- Tackle Normal
----- Smog Poison
----- Sludge Poison
LV 39 Smokesrceen Normal
LV 43 Self Destruct Normal
LV 49 Haze Ice
LV 53 Explosion Normal
TMs: 06, 15, 20, 24, 25, 31, 32, 34, 36, 38, 44, 47, 50
HMs: N/A
Advice: Their Sludge and Smokesrceen attacks are bothersome, so bring potions.