Onix
Gold

It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way.

Silver

It rapidly bores through the ground at 50 mph by squirming and twisting its mas­ sive, rugged body.

Crystal

As it digs through the ground, it absorbs many hard objects. This is what makes its body so solid.

Evolution Chain

onix
Onix
🔄
Trade
+
metal-coat metal coat
steelix
Steelix

Pokédex & Training Data

Classification Rock Snake Pokémon
Height 8.8 m (28'10")
Weight 210.0 kg (463.0 lbs)
Abilities N/A in Gen II
EV Yield +1 defense
Catch Rate 45
Base Friendship 70
Growth Rate medium
Gender Ratio
♂ ♀
Egg Groups Mineral

Pokédex Numbers

Kanto (R/B/Y) #095
Johto (G/S/C) #062
Sinnoh (D/P) #034
Sinnoh (Plat.) #034
Johto (HG/SS) #062
Unova (B2/W2) #071
Kalos (Coastal) #053
Galar (Sw/Sh) #178
Hisui #118
National #095

Held Items

None in this generation.

Game Locations

Kanto Victory Road 1 1f
Kanto Victory Road 1 2f
Kanto Victory Road 1 3f
Mt Silver 1f
Mt Silver Top
Rock Tunnel B1f
Union Cave 1f
Union Cave B1f
Union Cave B2f

Learned Moves

Level Up Moves

Gold/Silver
Lvl Name Class Power Acc. PP Effect
1 Tackle
40 100% 35 Inflicts regular damage with no additional effect.
1 Screech
— 85% 40 Lowers the target’s Defense by two stages.
10 Bind
15 85% 20 Prevents the target from fleeing and inflicts damage for 2-5 turns.
14 Rock Throw
50 90% 15 Inflicts regular damage with no additional effect.
23 Harden
— — 30 Raises the user’s Defense by one stage.
27 Rage
20 100% 20 If the user is hit after using this move, its Attack rises by one stage.
36 Sandstorm
— — 10 Changes the weather to a sandstorm for five turns.
40 Slam
80 75% 20 Inflicts regular damage with no additional effect.
Crystal
Lvl Name Class Power Acc. PP Effect
1 Tackle
40 100% 35 Inflicts regular damage with no additional effect.
1 Screech
— 85% 40 Lowers the target’s Defense by two stages.
10 Bind
15 85% 20 Prevents the target from fleeing and inflicts damage for 2-5 turns.
14 Rock Throw
50 90% 15 Inflicts regular damage with no additional effect.
23 Harden
— — 30 Raises the user’s Defense by one stage.
27 Rage
20 100% 20 If the user is hit after using this move, its Attack rises by one stage.
36 Sandstorm
— — 10 Changes the weather to a sandstorm for five turns.
40 Slam
80 75% 20 Inflicts regular damage with no additional effect.

TM/HM Moves

Gold/SilverCrystal
Name Class Power Acc. PP Effect
HM04 Strength
80 100% 15 Inflicts regular damage with no additional effect.
TM02 Headbutt
70 100% 15 Has a 30% chance to make the target flinch.
TM03 Curse
— — 10 Ghosts pay half their max HP to hurt the target every turn. Others decrease Speed but raise Attack and Defense.
TM05 Roar
— — 20 Immediately ends wild battles. Forces trainers to switch Pokémon.
TM06 Toxic
— 90% 10 Badly poisons the target, inflicting more damage every turn.
TM08 Rock Smash
40 100% 15 Has a 50% chance to lower the target’s Defense by one stage.
TM10 Hidden Power
60 100% 15 Power and type depend upon user’s IVs. Power can range from 30 to 70.
TM11 Sunny Day
— — 5 Changes the weather to sunny for five turns.
TM13 Snore
50 100% 15 Has a 30% chance to make the target flinch. Only works if the user is sleeping.
TM17 Protect
— — 10 Prevents any moves from hitting the user this turn.
TM20 Endure
— — 10 Prevents the user’s HP from lowering below 1 this turn.
TM21 Frustration
— 100% 20 Power increases as happiness decreases, up to a maximum of 102.
TM23 Iron Tail
100 75% 15 Has a 30% chance to lower the target’s Defense by one stage.
TM26 Earthquake
100 100% 10 Inflicts regular damage and can hit Dig users.
TM27 Return
— 100% 20 Power increases with happiness, up to a maximum of 102.
TM28 Dig
80 100% 10 User digs underground, dodging all attacks, and hits next turn.
TM31 Mud Slap
20 100% 10 Has a 100% chance to lower the target’s accuracy by one stage.
TM32 Double Team
— — 15 Raises the user’s evasion by one stage.
TM34 Swagger
— 85% 15 Raises the target’s Attack by two stages and confuses the target.
TM35 Sleep Talk
— — 10 Randomly uses one of the user’s other three moves. Only works if the user is sleeping.
TM37 Sandstorm
— — 10 Changes the weather to a sandstorm for five turns.
TM44 Rest
— — 5 User sleeps for two turns, completely healing itself.
TM45 Attract
— 100% 15 Target falls in love if it has the opposite gender, and has a 50% chance to refuse attacking the user.

Egg Moves

Gold/SilverCrystal
Name Class Power Acc. PP Effect
Flail
— 100% 15 Inflicts more damage when the user has less HP remaining, with a maximum of 200 power.
Rock Slide
75 90% 10 Has a 30% chance to make the target flinch.

Base Stats

Hp 35
Attack 45
Defense 160
Sp. Atk 30
Sp. Def 45
Speed 70
Total 385

Type Defenses

(vs. Gen 6+ rules)

0.5x
0.5x
4x
4x
0x
2x
2x
0.25x
2x
0.5x
0.5x
2x