Onix

Onix
Onix's official artwork from Pokémon Red and Blue.
Universe	Pokémon
Debut	Pokémon Red and Green Versions (1996)
Games	SSB Melee
Move	Rock Throw
Rarity	1/12
Most recent non-Smash appearance	Pokémon Pokopia (2026)
Console/platform of origin	Game Boy
Voice actor	Unshō Ishizuka
Article on Bulbapedia	Onix (Pokémon)

Onix (イワーク, Iwark) is a creature in the Pokémon media franchise.

Origin

Onix is a Rock/Ground-type Pokémon introduced in Generation I, and is categorized within the Pokédex at #095 as the "Rock Snake Pokémon". It evolves into Steelix starting from Generation II when traded while holding a Metal Coat. It is notable for being Brock's signature Pokémon.

Rock Throw is a Rock-type move with 50 base power and 90% accuracy introduced in Generation I. It is the weakest Rock-type move with no special effects, and it can be learned naturally by a variety of Rock-type Pokémon at a low level, including Onix in all games since Pokémon Black 2 and White 2. Stat-wise, Onix has the highest Defense stat of all unevolved Pokémon, but its other stats are very poor, particularly its Special Attack and HP.

In Super Smash Bros.

Onix makes a cameo appearance in Pikachu's congratulations screen.

As a Poké Ball Pokémon

Onix as it appears in Super Smash Bros.

Onix can be summoned by a Poké Ball, using Rock Throw as its attack. When summoned, Onix leaps to the top of the screen and make boulders fall onto the stage. Onix itself can damage opponents as it rises, dealing 21% damage. The rocks hit opponents for 12% with set knockback.

Onix's voice clip used in the Japanese and English versions comes from the Pokémon anime episode Showdown in Pewter City.

Onix will drop 8-17 boulders, each spaced 15-45 frames apart and within 1000 units (roughly 33.33 units in later games) of were it spawned. Each boulder will have an initial downward speed of 0, 50, or 100 units per frame (u/f) and accelerate at 2 u/f per frame up to 200 u/f (roughly 0, 1.667, and 3.333 u/f, 0.0667 acceleration, and 6.667 u/f max in later games).

Onix has a spawn chance of 1/12.

In Super Smash Bros. Melee

Onix does not return as a Poké Ball summon, but does briefly appear in the opening cinematic.

As a stage element

Onix, as seen in the Poké Floats stage.

A large balloon of Onix (in actuality, the 3D model of Onix used in Pokémon Stadium, and its sequel Pokémon Stadium 2, both for Nintendo 64) is one of the many floating platforms that make the Poké Floats stage. It is the second platform balloon to appear, right after Squirtle, and all matches on this stage have Onix making its appearance as a temporary, lengthy semi-soft platform with no ledges to be grabbed. The Onix balloon features rotating body parts, just like a real Onix.

In Super Smash Bros. 4

Onix is mentioned in Snivy's trophy description, misspelled “Onyx” in NTSC versions.

Gallery

• Super Smash Bros. sprite

• Onix in Pikachu's congratulations screen

Trivia

• Rock Throw's functionality in Super Smash Bros. is nearly identical to Wham Bam Rock's "Rock Hail" attack in Kirby Super Star, given how both were directed by Masahiro Sakurai.