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"Vahki were rarely, if ever, surprised by anything. After years of tracking down and subduing Rahi of all sorts, the order enforcement squads were experienced at handling almost any situation. Add to that foiling the ingenious attempts of some Matoran to try and take unscheduled vacations from work, and Vahki could safely be said to have seen it all."
— Narrator, Legends of Metru Nui

Manufacturer Onu-Matoran
Function Enforce order on Metru Nui
Powered by Metru Nui power
Powers Flight
Tools Stun Staffs
Kanoka Launchers
Status Destroyed
Location Metru Nui (formerly)
Pronunciation VAH-kee

The Vahki were mechanical order-enforcers utilized on Metru Nui before the Great Cataclysm. They came in six basic models—each assigned their own respective Metru—and patrolled in squads of six to eight members. Two additional, specialized models handled larger tasks such as crowd control.


After the failure of the Kralhi, the Matoran Nuparu was again commissioned to construct robotic defenders, and constructed the eight different Vahki models. One Vahki model was assigned to each Metru, and two were kept as special reserves, for emergencies. At the time of the Toa Metru, there were 5,000 active Vahki. Special hives were constructed to power the machines. The Vahki were tasked with enforcing order in Metru Nui, and kept the Matoran at their jobs. The Vahki maintained order in the city, ensuring that the Matoran worked, and that larger threats, such as the Kanohi Dragon, did not endanger the city.

Rorzakh supervising Matoran entering the Coliseum

When Makuta Teridax began impersonating Turaga Dume, he ordered the Vahki to ignore the Dark Hunters he had brought in, and had them hunt down the Toa Metru instead. The Vahki attempted to subdue and capture the Toa Metru, believing them to be disturbing the peace. However, the Toa were able to evade the Vahki and collect the Great Disks that they needed. After they presented the Great Disks to the fake Dume, he had them denounced as traitors, and set the Vahki on them. Three of the Toa were captured, and three escaped to find Toa Lhikan. At a crucial stage in his plan, Teridax used the Vahki to kidnap all the Matoran and put them in Matoran Spheres.

When Teridax absorbed all the power from the Coliseum's power generator, it caused an energy feedback that ran through the entire city. A large number of Vahki were hooked up to recharging cradles in the hives when this happened, and the feedback destroyed some of them. Those that were not destroyed had the noticeable change of a uniform pattern of scorch marks on their cranium shells where the cradle power cables had been hooked up. The feedback also affected their speech centers, causing it to slow down, so that they could be heard and understood. They also could reassemble themselves after being destroyed, but were no longer capable of flight. In addition, the power level of their staffs was boosted to extremely high levels, so that they caused physical damage instead of just affecting their victims mentally. Also, the Vahki became convinced that the only way to completely enforce order in Metru Nui was to destroy every living creature in the city.[1]

Vakama found Vahki components in Mangaia, and realized that Teridax had been attempting to modify them. He then used the Vahki pieces to repair the Lhikan.

When the Visorak army overran Metru Nui, they destroyed all the remaining Vahki in the city.[2] The Matoran did not construct any new Vahki upon their return to Metru Nui, and since they have migrated to Spherus Magna, Vahki will likely never be reconstructed.

Alternate Universes

Toa Empire Alternate Universe

In this alternate universe, Vahki were continued to be used in Metru Nui under the oppressive dictatorship of the Toa Empire. When Toa Takanuva of the prime reality journeyed here, he defeated several Vahki guards to gain access to the Onu-Metru Archives.

Abilities and Traits

Vahki running on all fours

Each Vahki had multiple abilities and tools. They could teleport Kanoka disks from storehouses in their hubs[citation needed] and launch them from their built-in Kanoka Launchers. Their type-specific Stun Staffs could be fired at a target to render it more or less helpless. Vahki could also transform into two different modes: A two-legged mode, in which the Vahki stood upright, and a four-legged mode, where the Vahki used their tools as forelegs. Vahki used the four-legged mode for flight when necessary.[3][4][5][2][6][7][8][9] Vahki were generally poor swimmers, the only type designed to withstand time underwater being Bordakh.

Vahki could not speak normal Matoran. Instead, they communicated with ultrasonic signals. These signals, which were actually Matoran at a high speed and pitch, could only be understood by other Vahki.[10] A room in Dume's chamber at the Coliseum could translate the signals, however.[11] After the Great Cataclysm sent a power surge through the Vahki Hives, the signals slowed down to be comprehensible.[10]

The parts of a Vahki were forged in Ta-Metru, then transferred to Po-Metru for assembly.[12] There, there were two different construction areas: one for fitting larger parts together, the other for installing the Vahki's clockwork mechanisms into their skull casings.

Vahki Units

Basic Vahki

A Vorzakh

The six basic types of Vahki were:

Elite Vahki

These two elite Vahki types were used for special circumstances, which require more skill than a normal Vahki.

Set Information

Vahki in set form

The Vahki were released as sets in late 2004. Each Vahki set contained thirty-four pieces including its two staffs and a Kanoka disk that corresponded with the Metru of that Vahki. By pivoting the head, arms, and legs, one could convert the Vahki from two-legged mode to four-legged mode and vice-versa. When in two-legged mode a gear on the back could be turned to make the Vahki swing its staffs back and forth. Later, limited Edition Vahki sets sold at Target came packaged with a gold Kanohi Vahi and the Disk of Time. The Kranua and Kraahu were combiners of the sets, the former being made from the Nuurakh, Vorzakh, Rorzakh sets, and the latter being constructed from the Bordakh, Keerakh, and Zadakh sets.


"I asked a Vahki something once. I spent the next month scrubbing molten protodermis feeder tubes... with my mask."
Vakama, Disks of Danger

"Vahki don't knock. They smash doors down. And they keep smashing them down until they find the one you're hiding behind."
Nuju, Mystery of Metru Nui

"Nothing ruins a vacation faster than a blast from a stun staff."
— Narrator, Metru Nui Ministry of Tourism


Concept artwork and finalized model for BIONICLE 2's Vahki
  • The Vahki are Greg Farshtey's least favorite characters.[13]
  • In the Matoran language, the word Vahki means "law."
  • The BIONICLE 2 movie design for the Vahki appears to have been created before their building sets, with their earliest visual appearance, in Comic 16, using the silhouette of the on-screen design. Several changes were made to the head and legs of the finalized movie model as compared to the original concept art, so as to bring the design slightly closer to that of the building sets. The Stun Staffs from the BIONICLE 2 design, shared by all Vahki in the movie, were used for the Vorzakh set, with the other Vahki sets receiving newly-designed Staffs.
  • In early concept art, Vahki are called "Vuranak".


A squad of Bordakh
Books Comics Online Multimedia




Short Stories

Story Serials



Video Games



  1. Web of the Visorak. BIONICLE Adventures 7.
  2. 2.0 2.1 "Vahki." Encyclopedia Updated, p. 147.
  3. "Official Greg Discussion", post 778. BZPower Forums. (archived on
  4. "Official Greg Discussion", post 1513. BZPower Forums. (archived on
  5. "Vahki." Encyclopedia, p. 110.
  6. "Toa Metru!". BIONICLE 16.
  7. "Official Greg Discussion", post 1503. BZPower Forums. (archived on
  8. "Dreams of Darkness". BIONICLE 21.
  9. "Chapter 4." Legacy of Evil. BIONICLE Legends 4, p. 55,58.
  10. 10.0 10.1 "Chapter 4." Web of the Visorak. BIONICLE Adventures 7.
  11. Metru Nui - City of Legends, p. 17.
  12. "Official Greg Discussion", post 1845. BZPower Forums. (archived on
  13. "Chat with Greg Farshtey", post 7029936. LEGO Message Boards. (archived on

See also