Onix
Red/Blue

As it grows, the stone portions of its body harden to become similar to a diamond, but colored black.

Yellow

Burrows at high speed in search of food. The tunnels it leaves are used as homes by DIGLETTs.

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 I
EV Yield +1 defense
Catch Rate 45
Base Friendship 70
Growth Rate medium

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 2 1f
Kanto Victory Road 2 2f
Kanto Victory Road 2 3f
Rock Tunnel B1f
Rock Tunnel B2f

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 Screech
— 85% 40 Lowers the target’s Defense by two stages.
15 Bind
15 85% 20 Prevents the target from fleeing and inflicts damage for 2-5 turns.
19 Rock Throw
50 90% 15 Inflicts regular damage with no additional effect.
25 Rage
20 100% 20 If the user is hit after using this move, its Attack rises by one stage.
33 Slam
80 75% 20 Inflicts regular damage with no additional effect.
43 Harden
— — 30 Raises the user’s Defense by one stage.
Yellow
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.
15 Bind
15 85% 20 Prevents the target from fleeing and inflicts damage for 2-5 turns.
19 Rock Throw
50 90% 15 Inflicts regular damage with no additional effect.
25 Rage
20 100% 20 If the user is hit after using this move, its Attack rises by one stage.
33 Slam
80 75% 20 Inflicts regular damage with no additional effect.
43 Harden
— — 30 Raises the user’s Defense by one stage.

TM/HM Moves

Red/BlueYellow
Name Class Power Acc. PP Effect
HM04 Strength
80 100% 15 Inflicts regular damage with no additional effect.
TM06 Toxic
— 90% 10 Badly poisons the target, inflicting more damage every turn.
TM08 Body Slam
85 100% 15 Has a 30% chance to paralyze the target.
TM09 Take Down
90 85% 20 User receives 1/4 the damage it inflicts in recoil.
TM10 Double Edge
120 100% 15 User receives 1/3 the damage inflicted in recoil.
TM20 Rage
20 100% 20 If the user is hit after using this move, its Attack rises by one stage.
TM26 Earthquake
100 100% 10 Inflicts regular damage and can hit Dig users.
TM27 Fissure
— 30% 5 Causes a one-hit KO.
TM28 Dig
80 100% 10 User digs underground, dodging all attacks, and hits next turn.
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.
TM40 Skull Bash
130 100% 10 Raises the user’s Defense by one stage. User charges for one turn before attacking.
TM44 Rest
— — 5 User sleeps for two turns, completely healing itself.
TM47 Explosion
250 100% 5 User faints.
TM48 Rock Slide
75 90% 10 Has a 30% chance to make the target flinch.
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 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