This article is about the character in Pokémon Horizons. For the Pokémon, see Onix (disambiguation).
0554Darumaka.png The subject of this article has no official English name.
The name currently in use is a fan translation of the Japanese name.
オニキス Onyx
Onyx anime.png
Age Unknown
Gender Male
Eye color Yellow
Hair color White with black and red highlights
Hometown Unknown
Region Unknown
Anime series Pokémon Horizons: The Series
Debut The Ancient Poké Ball
English voice actor N/A
Japanese voice actor Yuki Onodera
Member of Explorers
Rank Admin

(Japanese: オニキス Onyx) is one of the admins of the Explorers, and a recurring major antagonist in Pokémon Horizons: The Series.


Onyx in the anime

Onyx first appeared as a hologram in The Ancient Poké Ball, silhouetted with two other Admins, Sango and Agate.

Onyx reappeared as a hologram in HZ016, this time not silhouetted, where he commented that Spinel's reason for his mission's failure was the result of tunnel vision.

He made his physical debut in HZ024, where he accompanied Hamber and Sango to an old castle in Hammerlocke in order to meet up with Amethio, Zirc and Onia, who were pursuing a mysterious Pokémon that formed from Liko's pendant.

In HZ025, Onyx arrived at Old Castle alongside Hamber and Sango. Onyx had his Garganacl indiscriminately take out the Pokémon living at Old Castle before battling Liko and Roy. Thankfully, Captain Pikachu arrived at Old Castle to rescue them, Pikachu attacked Glalie and then took Garganacl out of the fight, before escaping when Sango suddenly had her Glalie use Self-Destruct. After the Rising Volt Tacklers had escaped, Onyx scolded Sango for her reckless actions, which not only caused unnecessary destruction but also caused both of their Pokémon to be defeated.


Onyx overall appears to have a serious and stoic personality, hardly showing strong emotions at times, although he can still get frustrated or irritated when insulted by others, such as his fellow admin Sango. He usually obeys the orders of his superiors such as Hamber without much issues. Onyx is along with Sango, known as "the troublemakers", being less disciplined and more aggressive than their fellow admins. Onyx has a ruthless and combative disposition when operating, as seen during the siege on Diana's castle where he not only disobeyed orders to standby, but also indiscriminately commanded his Garganacl to attack and take out every Pokémon in his path by having them inflicted with Salt Cure. Nonetheless Onyx has his own personal limits and considers even Sango's volatile actions to be reckless.


Garganacl is Onyx's only known Pokémon. In HZ025, Garganacl indiscriminately defeated most the Pokémon living at Old Castle before being used to battle Liko and Roy. Captain Pikachu arrived in time to rescue them and Garganacl tried to hit it with Salt Cure, but Pikachu was able to avoid it and hit Garganacl with Volt Tackle, temporarily taking it out of the fight. However, when Sango recklessly commanded Glalie to use Self-Destruct, much to Onyx's protest, Garganacl was unfortunately defeated by Glalie's attack which took itself out as well.

Garganacl's known moves are Salt Cure and Wide Guard.

Debut HZ024

Voice actors

Language Voice actor
Japanese 小野寺悠貴 Yuki Onodera


Expression sheet of Onyx from Pokémon Horizons: The Series



Language Name Origin
Japanese オニキス Onyx From onyx


Boss: Gibeon
Administrators: HamberAmethioSpinel
Agents: OniaZirc

Pokémon Horizons characters
Protagonists Liko (Sprigatito) • Roy (Fuecoco)
Rising Volt Tacklers Friede (Captain Pikachu) • MollieOrlaLudlowMurdockDot (Quaxly)
Explorers AmethioOniaZircHamberSpinelSangoOnyxAgateGibeon
Relatives AlexLuccaDianaRoy's grandfather
Supporting cast Nurse JoyRotom PhonesAnnTerapagosLuciusNemonaGym LeadersMany temporary characters
See also: Original anime characters

  This article is part of Project Anime, a Bulbapedia project that covers all aspects of the Pokémon anime.