Ekans

PoisonIntimidate, Shed Skin, Unnerve (hidden)

Level-up moves 18

Lv	Move	Type	Cat	Pow	Acc	PP
1	Leer Frightens the foes with a leer to lower Defense.	Normal	Stat	—	100	30
1	Wrap Wraps and squeezes the foe times with vines, etc.	Normal	Phys	15	90	20
4	Poison Sting A toxic attack with barbs, etc., that may poison.	Poison	Phys	30	100	35
9	Bite Bites with vicious fangs. May cause flinching.	B_UPDATED_MOVE_TYPES >= GEN_2 ? TYPE_DARK : TYPE_NORMAL	Phys	60	100	25
12	Glare Intimidates and frightens the foe into paralysis.	Normal	Stat	—	100	30
17	Screech Emits a screech to sharply reduce the foe's Defense.	Normal	Stat	—	85	40
20	Acid Sprays a hide-melting acid. May lower Sp. Def.	Poison	Spec	40	100	30
25	Spit Up Releases stockpiled power (the more the better).	Normal	Spec	1	100	10
25	Stockpile Charges up power for up to 3 turns.	Normal	Stat	—	—	20
25	Swallow Absorbs stockpiled power and restores HP.	Normal	Stat	—	—	10
28	Acid Spray Sprays a hide-melting acid. Sharply reduces Sp. Def.	Poison	Spec	40	100	20
30	Poison Fang A sharp-fanged attack. May badly poison the foe.	Poison	Phys	50	100	15
33	Mud Bomb Throws a blob of mud to damage and cut accuracy.	Ground	Spec	65	85	10
36	Gastro Acid Stomach acid suppresses the foe's Ability.	Poison	Stat	—	100	10
38	Belch Lets out a loud belch. Must eat a Berry to use it.	Poison	Spec	120	90	10
41	Haze Creates a black haze that eliminates all stat changes.	Ice	Stat	—	—	30
44	Coil Coils up to raise Attack, Defense and Accuracy.	Poison	Stat	—	—	20
49	Gunk Shot Shoots filthy garbage at the foe. May also poison.	Poison	Phys	120	80	5

* a legal move, just moved to level-up · ** new to this game

#	Move · where to get it	Type	Pow
TM06	Toxic Route 17	Poison	—
TM10	Hidden Power Lake of Rage	Normal	60
TM11	Sunny Day Goldenrod City	Fire	—
TM17	Protect Goldenrod City	Normal	—
TM18	Rain Dance Slowpoke Well	Water	—
TM19	Giga Drain Celadon City Gym	Grass	75
TM21	Frustration Celadon City	Normal	1
TM23	Iron Tail Olivine City Gym	Steel	100
TM26	Earthquake Victory Road	Ground	100
TM27	Return Goldenrod City	Normal	1
TM28	Dig National Park	Ground	80
TM32	Double Team Not placed on any map in the source — the game doesn't say where this one comes from	Normal	—
TM36	Sludge Bomb Route 43	Poison	90
TM39	Rock Tomb Union Cave	Rock	60
TM41	Torment Route 8	Dark	—
TM42	Facade Route 15	Normal	70
TM43	Secret Power Lake of Rage	Normal	70
TM44	Rest Goldenrod City	Psychic	—
TM45	Attract Goldenrod City Gym	Normal	—
TM46	Thief Rocket Hideout	Dark	60
TM49	Snatch Route 39	Dark	—
TM58	Endure Celadon City	Normal	—
TM66	Payback Route 35	Dark	50
TM78	Captivate Celadon City	Normal	—
TM79	Dark Pulse Celadon City	Dark	80
TM80	Rock Slide Pewter City Gym	Rock	75
TM82	Sleep Talk Celadon City	Normal	—
TM83	Natural Gift Goldenrod City	Normal	1
TM84	Poison Jab Fuchsia City Gym	Poison	80
TM87	Swagger Olivine Lighthouse	Normal	—
TM90	Substitute Goldenrod City	Normal	—
HM04	Strength Olivine City	Normal	80

Egg moves: Pursuit, Slam, Spite, Beat Up, Poison Fang, Scary Face, Poison Tail, Disable, Switcheroo, Iron Tail, Sucker Punch, Snatch
Move tutors: Endure, Rock Slide, Sleep Talk, Substitute, Swagger, Body Slam, Brutal Swing, Bulldoze, Confide, Double-Edge, Headbutt, Infestation, Leech Life, Mimic, Mud-Slap, Round, Sludge Wave, Snarl, Snore, Venoshock
Evolves into Arbok at Level 22