Brock's Steelix (Japanese: タケシのハガネール Takeshi's Haganeil) was the first Pokémon acquired by Brock. He received it as an Onix as a birthday present from his father, Flint, as seen in A Wailord of a Time!. Its voice actor in both Japanese and English is 石塚運昇 Unshō Ishizuka.

Like all of Brock's Pokémon, Onix received very little screentime in comparison to the Pokémon of the other main characters. This may have been due to its massive size, although it did have an impressive battle against Vicious's Tyranitar in Pokémon 4Ever. Like most of Brock's pre-Hoenn Pokémon, Steelix does not have a distinct personality.

Brock ended up giving Onix and two of his other Pokémon to his eldest sibling, Forest, who took on the role of Gym Leader at Pewter City. When Brock returned to the gym in Grating Spaces, Onix had evolved into a Steelix.

Attacks used

• Tackle
• Dig
• Bind
• Rock Throw
• Iron Tail
• Dragonbreath

Related articles

For more information on this Pokémon's species, see Onix and Steelix.

Brock's Pokémon
On hand:	Steelix	Forretress	Ludicolo	Marshtomp	Croagunk	Blissey
At Pewter Gym / Home:	Geodude	Crobat	Sudowoodo	Comfey
Returned:	Vulpix
Caught for someone else:	Tauros
Temporary:	Hoothoot	Totodile	Ninetales	Shiftry	Staravia	Torterra
	Aipom	Magnemite	Onix	Feraligatr
Ride Pokémon:	Charizard
Adventures only:	Kabutops	Graveler
Electric Tale only:	Golem	Vileplume
Pocket Monsters only:	Pikachu