The Piraka are rogue Dark Hunters who arrived on Voya Nui to search for the Mask of Life. Unlike the other teams of villains and Toa which are leaded by the person in crimson-red armor, this one is led by an emerald-green armored beast.
Piraka Zaktan:

Zaktan was once a Dark Hunter. He was recruited by the Shadowed One while working as a slave in a Protodermis Mine.
5,000 Years Ago: Zaktan leads the others (except for Avak) in an unsuccessful revolt against the Shadowed One. The Shadowed One tried to execute Zaktan by disintegration, but everyone is surprised to see Zaktan survive as a mass of protodites.
250 Years Ago: In the war with the Brotherhood of Makuta; Zaktan, Reidak, and Thok are a few of the Hunters dispatched to guard a base. Thok loots the base, and Zaktan explores it as well, but a tip-off from Roodaka that the base was once the Brotherhood’s encourages Zaktan to take a closer look. What he finds is the Brotherhood’s master plan: schemes, calculations, backup plans, prophesies… Stunned at first, Zaktan vows to use this knowledge to his advantage, and destroys the records before he leaves.
He eventualy decided to go rogue with another 5 of his species: Hakann, Vezok, Reidak, Avak, and Thok.
After Teridax was defeated by Takanuva, rumours began to cuirculate, so Zaktan and the Piraka journeyed to Mangaia, to loot it. They found something interseting: the Spear of Fusion. Due to misuse, it split Vezok in two, the other half named Vezon.
While still in Teridax’s Lair, Zaktan and the other Piraka suddenly gained knowlege of the Mask of Life. They all wondered how this happened,but only Zaktan knew that Makuta’s spirit told them this. Zaktan led the others to the exit,when they were attacked by two Mana Ko. Vezon escapes,and the other piraka find the Toa Mata’s Toa Canisters,and decided to use them to get to Voya Nui,where the mask was. When they arrived, they acted as Toa to fool all but six Matoran.
After their battles with the Toa Nuva and Toa Inika, Zaktan and the other Piraka made their way down the staircase leading to the Ignika, fighting their way past guardians and trails along the way. After arriving in the Mask of Life chamber, they encountered Vezon. when the Inika arrived and began to fight Vezon and Fenrakk, the Piraka woke up and stayed out of the way.
Soon after the Ignika flew out of the chamber and into the sea surrounding the island suface. After the Inika went after it, Zaktan decided the Piraka should lay low for awhile.
Due to the exposure to the Pit Mutagen, Zaktan and the other Piraka became water-breathers and lost their bodies, retaining only their spines and heads. During the Toa Mahri’s journey up The Cord with the Matoran of Mahri Nui, the mutated Piraka ambushed the Toa. Zaktan almost killed Idris but she escaped. The Piraka were then defeated by Axonn and taken away by the Order of Mata Nui for interrogation. Zaktan was taken by Helryx. Helryx then gave Zaktan to the Toa Hagah as a guide to find Teridax.
Piraka Hakann:

7,000 years ago, Vezok and Hakann team up to steal a treasure from a besieged Toa fortress. Vezok has Hakann “distract” (that is, get beat up by) the guards while he goes after the treasure. He finds a tablet labeled “Makoki stone” and realizes it has hidden inscriptions detailing the operations of the Brotherhood of Makuta. After escaping the fortress, both are caught by the Dark Hunter “Ancient” (who also wanted the Makoki stone) and forcibly recruited, joining the other four Skakdi who were already members.
5,000 Years Ago: Zaktan leads Hakann and the others (except for Avak) in an unsuccessful revolt against the Shadowed One. The Shadowed One tries to execute Zaktan by disintegration, but everyone is surprised to see Zaktan survive as a mass of protodites.
3,000 Years Ago: When Thok fails to kidnap Turaga Dume in the latest of a series of failures concerning Metru Nui, the Shadowed One loses patience and has the Dark Hunters invade the city. Though initially successful, hundreds of Toa rally to Metru Nui’s defense. After months of fighting, Hakann watches Toa Nidhiki betray his brothers, and catches Toa Lhikan, also watching. Hakann opts not to warn the other Hunters about Lhikan, as doing so would mean he would be caught and jailed, but instead offers Lhikan a deal: if Lhikan lets the Hunters leave Metru Nui freely after his trap is sprung, he can have the Makoki stone back. Lhikan remembers what other Toa sacrificed for the stone, he agrees; adding the condition that the Hunters must take Nidhiki with them.
He and other five other Skakdi left the Hunters and formed the group called the Piraka, and went to investigate Makuta’s “death”. When they arrived in Mangaia, Hakann found the Spear of Fusion, but accidentaly shot at Vezok while set in reverse, causing him to spilt in two. The second being took the name “Vezon” and claimed the spear. Makuta, now just his floating energy, telephathicly influenced the Piraka to search for the Ignika, Mask of Life, but a pair of Mana-Ko attacked them, among which Vezon abandoned the Piraka. He took a Toa Canister and left Mangaia to Voya Nui. The Piraka arrived on Mata Nui and found the Toa Mata’s canisters and used them to get to Voya Nui (Hakann tried to weld Vezok’s canister shut, but Vezok escaped).
The Piraka arrived on Voya Nui and claimed to be Toa to the Matoran. But after The Voya Nui Resistance Team discovered truth. The Piraka shot all of the Matoran with Antidermis (expect six), and enslaved them. When the Toa Nuva arrived, they engaged in a fierce battle with the Piraka. When all Toa Nuva were defeated, Zaktan ordered to throw them into Mt.Valmai, but it enters an eruption, and the Toa escape. Later, the Toa return with the Matoran resistence, but Brutaka defeat them all, and the Matoran are captured by the Piraka.
A few days after, the Toa Inika arrived, the Matoran were freed, and they invaded the Piraka Strongold, and began to battle. In the midst of the battle, Hakann shot a Zamor at Brutaka and stole his power (with Thok, while he was touching him), and the Toa Inika and remaining Piraka are forced to strike an uneasy alliance to try and depower them.
Meanwhile, the two beings fight each other until the Toa and Piraka caught up with them, and Hewkii was able to fire the Zamor that returns Brutaka’s power to him just as Hakann and Thok lauch a combined attack that knocks everyone out, exept Zaktan (and opened a entrance to the Ignika). They began walk down the staircase to the Chamber of Life. Hakann stopped to relax, but, when the other Piraka encounter him, his heat power has overloaded, causing his armor to melt. Irnakk had encountered them. Zaktak helped the others free from him and they arrived in the Chamber of Life.
They encountured Vezon, who used his Spear to combine Reidak and Vezok into a mostrous being to knock out Hakkan and the other three remaining Piraka. After the Inika defeted Kardas and the Ignika vanished under the sea, the Piraka decided to lay low and strike at just the right moment…
Due to the exposure to the Pit Mutagen, Hakann and the other Piraka became water-breathers and lost their bodies, retaining only their spines and heads. During the Toa Mahri’s journey up The Cord with the Matoran of Mahri Nui, the mutated Piraka ambushed the Toa. Hakann was the first to attack. Later on, however, they, the Toa, and Matoran were knocked unconscious by a blast of electricity produced by Axonn. The Piraka were then taken away by the Order of Mata Nui for interrogation. He and the other piraka will soon be taken to the pit by the bionicle that replaced Botar.
Piraka Thok:

He was recruited into the Dark Hunters when he tried to steal the weapons of three of them that were on a mission. He was described as a loner and very antisocial. He was manipulative, and excellent at turning teammates against each other, and tends to abandon them when things go wrong.
- 5,000 Years Ago: Zaktan leads Thok and the others (except for Avak) in an unsuccessful revolt against the Shadowed One. The Shadowed One tries to execute Zaktan by disintegration, but everyone is surprised to see Zaktan survive as a mass of protodites.
- 3,000 Years Ago
When Thok fails to kidnap Turaga Dume in the latest of a series of failures concerning Metru Nui, the Shadowed One loses patience and has the Dark Hunters invade the city. Though initially successful, hundreds of Toa rally to Metru Nui’s defense. After months of fighting, Hakann watches Toa Nidhiki betray his brothers, and catches Toa Lhikan also watching. Hakann opts not to warn the other Hunters about Lhikan, as doing so would mean he would be caught and jailed, but instead offers Lhikan a deal: if Lhikan lets the Hunters leave Metru Nui freely after his trap is sprung, he can have the Makoki stone back. Lhikan remembers what other Toa sacrificed for the stone, he agrees; adding the condition that the Hunters must take Nidhiki with them.
In the war with the Brotherhood of Makuta; Zaktan, Reidak, and Thok are a few of the Hunters dispatched to guard a base. Thok loots the base, and Zaktan explores it as well, but a tip-off from Roodaka that the base was once the Brotherhood’s encourages Zaktan to take a closer look. What he finds is the Brotherhood’s master plan: schemes, calculations, backup plans, prophesies… Stunned at first, Zaktan vows to use this knowledge to his advantage, and destroys the records before he leaves.
Thok and other five other Skakdi left the Hunters and formed the group called the Piraka, and went to investigate Makuta’s “death”. When they arrived in Mangaia, Hakann found the Spear of Fusion, but accidentaly shot at Vezok while set in reverse, causing him to spilt in two. The second being took the name “Vezon” and claimed the spear. Makuta, now just his floating energy, telephathicly influenced the Piraka to search for the Ignika, Mask of Life, but a pair of Mana-Ko attacked them, among which Vezon abandoned the Piraka. He took a Toa Canister and left Mangaia to Voya Nui. The Piraka arrived on Mata Nui and found the Toa Mata’s canisters and used them to get to Voya Nui (Hakann tried to weld Vezok’s canister shut, but Vezok escaped).
The Piraka arrived on Voya Nui and claimed to be Toa to the Matoran. But after The Voya Nui Resistance Team discovered truth. The Piraka shot all of the Matoran with Antidermis (expect six), and enslaved them. When the Toa Nuva arrived, they engaged in a fierce battle with the Piraka. When all Toa Nuva were defeated, Zaktan ordered to throw them into Mt.Valmai, but it enters an eruption, and the Toa escape. Later, the Toa return with the Matoran resistence, but Brutaka defeat them all, and the Matoran are captured by the Piraka.
A few days after, the Toa Inika arrived, the Matoran were freed, and they invaded the Piraka Strongold, and began to battle. In the midst of the battle, Hakann shot a Zamor at Brutaka and stole his power (with Thok, while he was touching him), and the Toa Inika and remaining Piraka are forced to strike an uneasy alliance to try and depower them.
Meanwhile, the two beings fight each other until the Toa and Piraka caught up with them, and Hewkii was able to fire the Zamor that returns Brutaka’s power to him just as Hakann and Thok lauch a combined attack that knocks everyone out, exept Zaktan (and opened a entrance to the Ignika). They began walk down the staircase to the Chamber of Life. Hakann stopped to relax, but, when the other Piraka encounter him, his heat power has overloaded, causing his armor to melt. Irnakk had encountered them. Zaktan helped the others free from him and they arrived in the Chamber of Life.
They encountured Vezon, who used his Spear to combine Reidak and Vezok into a mostrous being to knock out Thok and the other three remaining Piraka. After the Inika defeted Kardas and the Ignika vanished under the sea, the Piraka decided to lay low and strike at just the right moment…
Due to the exposure to the Pit Mutagen, Thok and the other Piraka became water-breathers and lost their bodies, retaining only their spines and heads. During the Toa Mahri’s journey up The Cord with the Matoran of Mahri Nui, the mutated Piraka ambushed the Toa, where they and the Toa, Matoran, and Piraka were later knocked unconsicious by a blast of Axonn’s. The Piraka were later taken away by the Order of Mata Nui for interrogation.
Piraka Vezok:

7,000 years ago, Vezok and Hakann teamed up to steal a treasure from a besieged Toa fortress. Vezok has Hakann “distract” (that is, get beat up by) the guards while he goes after the treasure. He finds a tablet labeled “Makoki stone” and realizes it has hidden inscriptions detailing the operations of the Brotherhood of Makuta. After escaping the fortress, both are caught by the Dark Hunter “Ancient” (who also wanted the Makoki stone) and were forcibly recruited, joining the other four Skakdi who were already members.
5,000 Years Ago: Zaktan leads Vezok and the others (except for Avak) in an unsuccessful revolt against the Shadowed One. The Shadowed One tries to execute Zaktan by disintegration, but everyone is surprised to see Zaktan survive as a mass of protodites.
3,000 Years Ago: Vezok, Reidak and Avak freed the Kanohi Dragon from its icy prison, letting it loose on Metru Nui. They then went to Turaga Dume offering the Hunter’s “protection”. Dume refused, but just as Vezok tries to kill him; Toa Lhikan, Toa Nidhiki, and the rest of their team intervenes.
Later, few months to actual events, he and the other five leave the Hunters and form the group called the Piraka, and go to investigate Makuta’s death, and then arrive in Mangaia. After discovering Makuta’s shattered armor (and Reidak accidentally throwing his Kanohi Kraahkan into the Silver Sea), Hakann found the Spear of Fusion, but accidentaly shot Vezok with it in reverse and split him into two beings. The first was still considered Vezok and the second being took the name “Vezon”, and claims the spear.
A few seconds later, Makuta telephathicly influenced them to search for the Ignika, Mask of Life, but a pair of Mana-Ko attacked them. Vezon escaped and took a Toa Canister and left Mata Nui. The rest soon arrived on Mata Nui’s surface and found the Toa Mata’s Toa Canisters and used them to get to Voya Nui (Hakann tried to sabotage Vezok’s canister, but failed).
When the Piraka arrived on Voya Nui, they began to act like Toa to fool the Matoran, but after six Matoran discovered the truth. At the same time the Piraka began to enslave the island’s Matoran.
When the Toa Nuva arrived, they fought the villans fiercely, but the Toa Nuva were defeated. Zaktan ordered the rest to throw them into Mount Valmai, but it erupted in time, and the Toa escaped. Later, the Toa return with the Matoran resistence, but Brutaka, Zaktan’s new ally, defeat them all, and the Matoran were captured by the Piraka. A short time after, the Toa Inika arrived, the Matoran were freed, and the Toa invaded the Piraka Strongold and began a battle. In the midst of the battle, Hakann shot a Zamor at Brutaka and stole his power (with Thok, while he was touching him), and the Toa Inika and remaining Piraka strike an uneasy alliance to try and depower them.
Meanwhile, the two began fighting each other until the Toa and Piraka caught up with them, and Hewkii was able to fire the shot that returned Brutaka’s power to him just as Hakann and Thok launch a combined attack that knocks everyone out, exept for Zaktan (and opened an entrance to the Ignika). They started walking down the staircase to the chamber of life, then Hakann stopped to relax. But when Vezok and the other Piraka encounter him, his heat power was oveloaded, causing his armor to melt, caused by fear…
Irnakk had encountered them. Zaktak helped the others free from him and they arrived in the Chamber of Life. They encountured Vezon, who used his Spear to fuse Reidak and Vezok into a mostrous being to knock out Hakann and the other three remaining Piraka. After the Inika defeted Kardas and the Ignika vanished under the sea, the Piraka decided to lay low and strike at just the right moment…
Due to the exposure to the Pit Mutagen, Vezok and the other Piraka became water-breathers and lost their bodies, retaining only their spines and heads. During the Toa Mahri’s journey up The Cord with the Matoran of Mahri Nui, the mutated Piraka ambushed the Toa. However, the Piraka were defeated by Axonn, and were later taken away by the Order of Mata Nui for interrogation.
Piraka Avak:

Avak was origially the target of a Dark Hunter mission. A Hunter had been captured and imprisoned, and Avak was the jailer. Avak was defeated and brought back to the Shadowed One and recruited.
4,000 Years Ago: Vezok, Reidak, and Avak free the Kanohi Dragon from its prison in order to pressure Turaga Dume into allowing a Dark Hunter base in Metru Nui. At Dume’s refusal, Vezok tries to kill him but Toa Lhikan, Toa Nidhiki, and nine other Toa (one of them most likely Tuyet) intervene. With neither side willing to pick a fight at the moment, the Hunters leave and let the Toa deal with the dragon.
Zaktan eventualy decided to go rouge with another 5 of his species: Hakann, Vezok, Reidak, Avak, and Thok.
After Teridax was defeated by Takanuva, rumours began to cuirculate, so Zaktan and the Piraka journeyed to Teridax’s lair, to loot it. They found something interseting: the Spear of Fusion. Due to misuse, it split Vezok in two, the other half named Vezon.
While still in Teridax’s Lair, Zaktan and the other Piraka suddenly gained knowlege of the Mask of Life. They all wondered how this happened, but only Zaktan knew that Teridax’s spirit told them this. Zaktan led the others to the exit,when they were attacked by two Mana-Ko. Vezon escapes,and the other Piraka find the Toa Mata’s Toa Canisters,and decided to use them to get to Voya Nui,where the mask was. When they arrived, they acted as Toa to fool all but six Matoran.
After their battles with the Toa Nuva and Toa Inika, Avak and the other Piraka made their way down the staircase leading to the Ignika, fighting their way past guardians and trails along the way. After arriving in the Mask of Life chamber, they encountered Vezon. when the Inika arrived and began to fight Vezon and Fenrakk, the Piraka woke up and stayed out of the way.
Soon after the MoLi flew out of the chamber and into the sea surrounding the island suface. After the Inika went after it Zaktan decided the Piraka should lay low for awhile.
Due to the exposure to the Pit Mutagen, Avak and the other Piraka became water-breathers and lost their bodies, retaining only their spines and heads. During the Toa Mahri’s journey up The Cord with the Matoran of Mahri Nui, the mutated Piraka ambushed the Toa, where they and the Toa, Matoran, and Piraka were later knocked unconsicious by a blast of Axonn’s. The Piraka were later taken away by the Order of Mata Nui for interrogation.
Piraka Reidak:

Reidak was recruited to the Dark Hunters when a dispute with the law on his home island of Zakaz escalated to the point that the entire city was wiped out.
5,000 Years Ago: Zaktan leads Reidak and the others (except for Avak) in an unsuccessful revolt against the Shadowed One. The Shadowed One tries to execute Zaktan by disintegration, but everyone is surprised to see Zaktan survive as a mass of Protodites.
4,000 Years Ago: Vezok, Reidak, and Avak freed the Kanohi Dragon from its prison in order to pressure Turaga Dume into allowing a Dark Hunter base in Metru Nui. At Dume’s refusal, Vezok tries to kill him but Toa Lhikan, Toa Nidhiki, and nine other Toa (one of them most likely Tuyet) intervene. With neither side willing to pick a fight at the moment, the Hunters leave and let the Toa deal with the dragon.
250 Years Ago: In the war with the Brotherhood of Makuta; Zaktan, Reidak, and Thok are a few of the Hunters dispatched to guard a base. Thok loots the base, and Zaktan explores it as well, but a tip-off from Roodaka that the base was once the Brotherhood’s encourages Zaktan to take a closer look. What he finds is the Brotherhood’s master plan: schemes, calculations, backup plans, prophesies… Stunned at first, Zaktan vows to use this knowledge to his advantage, and destroys the records before he leaves.
After Makuta was defeated by Takanuva, rumors began to circulate, so Reidak and the Piraka journeyed to Makuta’s lair, to loot it. They found something interesting: the Spear of Fusion. Due to misuse, it split Vezok in two, the other half named Vezon.
While still in Makuta’s Lair,Reidak and the others suddenly gained knowledge of the Mask of Life. They all wondered how this happened,but only Zaktan knew that Makuta’s spirit told them this. Zaktan led the others to the exit,when they were attacked by two Mana Ko. Vezon escapes,and the other Piraka find the Toa Mata’s Toa Canisters,and decided to use them to get to Voya Nui, where the mask was. When they arrived, they acted as Toa to fool all but six Matoran. For some weird reason, Reidak slipped and fell 500 feet and landed head first. All it did was make him angry.
After their battles with the Toa Nuva and Toa Inika, Reidak and the other Piraka made their way down the staircase leading to the Ignika, fighting their way past guardians and trails along the way. After arriving in the Mask of Life chamber, they encountered Vezon. When the Inika arrived and began to fight Vezon and Fenrakk, the Piraka woke up and stayed out of the way.
Soon after the Ignika flew out of the chamber and into the sea surrounding the island surface. After the Inika went after it Zaktan decided the Piraka should lay low for awhile.
Due to the exposure to the Pit Mutagen, Reidak and the other Piraka became water-breathers and lost their bodies, retaining only their spines and heads. During the Toa Mahri’s journey up The Cord with the Matoran of Mahri Nui, the mutated Piraka ambushed the Toa, where they and the Toa, Matoran, and Piraka were later knocked unconsicious by a blast of Axonn’s. The Piraka were later taken away by the Order of Mata Nui for interrogation.
Piraka Vezon:

When the Piraka were investigating Makuta’s lair, Hakann found the Spear of Fusion and accidentally shot Vezok with it set in reverse. The result was that a second being was split off from Vezok, one that had Vezok’s intellectual capabilities (though it seems Vezok kept everything else, including his sanity). Thok called the new being a “Vezon” – a double – and the being felt the name was agreeable. Vezon took the Spear of Fusion for himself just before the Piraka gained the knowledge of the Ignika Mask of Life. As the group was attacked by a pair of Mana-Ko shortly afterward, Vezon slipped away and headed directly for Voya Nui. Vezon’s canister came from an Order of Mata Nui Member that came to Mata Nui shortly after the Matoran did, and the member was killed by Teridax.
Upon arriving on the island, the Mask of Life allowed Vezon to reach it. Once he did, he became cursed; fused somehow to a Fenrakk spider and forcibly made one of the Ignika’s guardians. Weeks afterword, the Piraka made their way down to the Mask of Life chamber and were defeated by Vezon. Moments after, the Inika arrived and battled Vezon and Fenrakk. At one point Vezon urged Fenrakk to fall into lava. They emerged as Vezon and Kardas.
Eventually, the Inika manged to defeat Vezon and Kardas, and remove the Mask of Life. However the Kardas Dragon managed to knock the Kanohi out of Matoro’s hand. the Ignika then flew to the surface.
After the Ignika was removed, Vezon was defused from Kardas and the two went their seperate ways. Vezon, with the rebuilt Spear of Fusion (Reidak broke it earlier), decided to get his revenge on the Toa Inika. While the Inika were going down to Mahri Nui, Vezon tried to , but instead was taken captive by the Zyglak. Vezon escaped the Zyglak with the help of the Order of Mata Nui, and joined a team fighting the Brotherhood of Makuta to pay his debt. The team consist of the ex-Order of Mata Nui member Brutaka (as the leader), Roodaka, Takadox, Carapar, the renegade Makuta Spiriah, and himself. Though Vezon had no dealings with the Brotherhood of Makuta and has no powers, Vezon was the team’s wild card. After finding Makuta Miserix, Vezon was imprisoned by the Order. He was then freed by Trinuma.