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The Serpentine are a race of snake people that once ruled Ninjago, but were banished to five separate tombs, to separate the five warring tribes. They inhabited the world of Ninjago, after being released by Lloyd Garmadon. They consist of five tribes. Each tribe is further divided into four classes: Generals, Warriors, Soldiers, and Scouts. An additional rank, Snake King, rules over all five tribes. They are currently in the Stone Army's former tomb.
Very little is known about the beginning of the Serpentine. One theory is that they were once snakes created by the The First Spinjitzu Master, and someone or something altered their genes to grow more human-like. Probably caused by someone or something to give only one snake the power to turn things wicked like Lord Garmadon. That snake is The Great Devourer. Pythor made himself king of the Serpentine in the first season. Lord Garmadon was the Serpentine King in Season 2-Part 1. Skales is the current (and final) King of the Serpentine.
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- “Had you released the Constrictai, the Venomari, or heaven forbid the Anacondrai, then we would have had a tussle.”
- ―Skales to Lloyd Garmadon
The Anacondrai were the most feared of all tribes, and resemble Anacondras. During the Serpentine Wars, where they became involved after Master Chen deceived them into believing the humans would attack them, they proved to be effective leaders and combatants, showing great strength and intelligence. When they were eventually defeated via the use of Sacred Flutes, the tribe's generals were banished to the Cursed Realm. Since the remaining Anacondrai were locked away without food, they became cannibalistic until Pythor was the last one remaining. Pythor is known to have the power to turn invisible. This is the only tribe that does not have a silver Fang Blade, but instead they have their Anacondrai Blades. During the storyline surrounding the Tournament of Elements, Master Chen performs a spell to transform him and his followers into pseudo-Anacondrai, essentially resurrecting the tribe. This new batch of Anacondrai attempts to start a Second Serpentine War. Pythor, however, finds a spell that would open the Cursed Realm, which would allow the former generals to return. The ghostly forms of the previous generals, headed by General Arcturus, appear and imprison the pseudo-Anacondrai in the Cursed Realm, leaving Pythor as the last remaining Anacondrai once more.
Ranking within the Anacondrai tribe appeared to be quite different than in other tribes. Generals were not distinguished by the presence of a tail, as all members of the Anacondrai had one. Additionally, the tribe was shown to have five generals during the Serpentine Wars, whereas other tribes have only had one general at a time. The only known rank in the original Anacondrai tribe, other than that of an ordinary soldier, was that of general. There have been six known Anacondrai generals:
- Pythor - The General of the Anacondrai.
- General Arcturus - Former General of the Anacondrai.
- Four unnamed Anacondrai Generals from the same time as Arcturus
The pseudo-Anacondrai were led by Master Chen.
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The Constrictai are led by Skalidor. They are strong and large. Constrictai are capable of traveling under the ground, but can be located by following the raising of the ground as they tunnel under it. According to LEGO.com their staff's anti-venom allows you to breathe again after being constricted or choked by a Constrictai. They are orange and black in color. With the exception of Skalidor, who has a snake tail, all Constrictai members have short legs. They seem to resemble Boa Constrictors. The ranks in this tribe are as follow:
- Skalidor - The heavyweight General of the Constrictai
- Bytar - The warrior of the Constrictai
- Chokun - a soldier-class member of the Constrictai
- Snike - a Scout-class member of the Constrictai.
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The Fangpyre, led by Fangtom, are red and white and have large fangs. Their fangs can turn inanimate objects into living snake-like creatures. Vehicles will turn into living snake-cars, mechs, or wrecking balls. Each vehicle takes on snake attributes such as a tail and eyes. They are also able to bite living creatures and turn them into snake people, with the venom slowly mutating the cells. However the venom is useless if the victim's heart rate rises. They seem to resemble Pit vipers. The ranks of the Fangpyre are as following:
- Fangtom - The two-headed general
- Fangdam - Fangtom's two-headed Warrior
- Fang-Suei - A Fangpyre soldier
- Snappa - A Fangpyre scout
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The Hypnobrai have been known to have two generals. Their original general, Slithraa, was challenged by his second-in-command, Skales, who won, which resulted in the latter replacing the former as the new general and Slithraa being demoted to a warrior.
The Hypnobrai are a Serpentine tribe with the power to hypnotize and control anyone. The Hypnobrai have a dark blue, yellow, and grey colour scheme. They resemble the Spectacled (Indian) Cobra and have the same Specactled pattern on their hood. Their eyes are red with spirals, giving them a "dazzling" look which, when in use, hypnotizes their victims. The ranks are as follows:
- Skales - The current Snake King and General of the Hypnobrai; former Warrior
- Slithraa - The current Warrior of the Hypnobrai; former General
- Mezmo - A Hypnobrai soldier
- Rattla - A Hypnobrai scout
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The Venomari are led by Acidicus and live in toxic bogs of acid that only they can survive in. They are green in colour and have the ability to spray venom at an enemy. This venom sabotages the victim's vision and makes them hallucinate, making the victim see everyone turn into what they fear most. They have four eyes, unless they lose one, like Lasha, have scars, and are red, lime green, and dark green. They resemble spitting cobras. The ranks of the Venomari are as follows:
- Acidicus - The Venomari General
- Lizaru - The Warrior of the Venomari
- Spitta - A Soldier of the Venomari
- Lasha - A one-eyed Venomari Scout
With the help of Skales, Pythor successfully united the five Serpentine tribes by challenging the other generals for their staffs. Skales and Pythor were both wearing earplugs, so when Skales gave Pythor the sacred flute, Skales just pretended to be annoyed and threw down his staff. All the other snake generals were so annoyed by the flute that they all threw down their staffs also. After defeating them, he dubbed himself the Snake King. However, after Pythor's defeat when he was eaten by the Great Devourer, Skales attempted to become the Snake King. He failed to when all of the Serpentine abandoned him and the other generals to follow Lord Garmadon.
Lord Garmadon ruled the Serpentine for the first half of Season 2. He would hit them, yell at them, and blame them for his failures. This made the Serpentine angry, so Skales abandoned Lord Garmadon in the middle of the ocean, and finally made himself the Snake King.
The Snake King title is still, as of now, held by Skales.
The generals are the leader of their respective tribes. Generals are easily distinguished from other Serpentine in that rather than legs, they have a tail. Like warriors and soldiers, they also have a less humanoid shaped head than scouts. In addition to the tails, the generals are also normally in possession of their tribe's respective Snake Staff, which is able to act as anti-venom to a tribe's power. For example, the Fangpyre staff would be able to return a person who has been bitten by a Fangpyre to their original form.
Generals are able to be debunked by being defeated by a Serpentine of a lower class, as seen when the Hypnobrai warrior, Skales, defeated the Hypnobrai general, Slithraa. Skales grew a tail while Slithraa lost his. This is likely the same for other tribes.
The Anacondrai were unique in their treatment of the rank of General; during the Serpentine Wars, the Anacondrai tribe had five active generals, including General Arcturus. As Pythor is the last remaining Anacondrai, whatever system they would have used, however, is no longer applicable.
The Serpentine Generals are as follows;
The warriors are the second-in-command of their tribe. They have the same shaped head as their tribe's generals, but normally have different markings. Rather than having tails like the generals, warriors have humanoid legs.
As Pythor was the sole living Anacondrai member, there are no known warriors from his tribe.
Warriors are as follows;
Below warriors are soldiers. Soldiers have humanoid legs like warriors and snake-like heads, but unlike the warriors, they are of a different shape than their respective generals' heads. They also have very large fangs. The soldiers typically have different head molds then the general and warrior classes of their tribes, and they also share head moulds between tribes, such as with Constrictai and Fangpyre as well as Hypnobrai and Venomari
Soldiers are as follows;
It appears that the soldiers are the judges of the slither pit, as Mezmo, the Hypnobrai soldier, was the judge of the Hypnobrai slither pit, and in "All of Nothing", Fang-Suei, the Fangpyre soldier, was the judge of the slither pit in the snakes' underground base.
Scouts are at the bottom of the Serpentine social ladder. They have humanoid legs like warriors and soldiers, but also humanoid heads with a snake-like hood.
Scouts are as follows;
Vipers are not actually part of the social classes, but they are part of the Serpentine armies. The vipers are small and can fit into a minifigure's hand like a whip. The young Great Devourer resembled a Venomari Toxic Viper, except it had frills behind its head. Additionally, its bite is unique in that it can turn the purest of things evil.
Vipers are as follows:
- Golden Viper
- Sly Viper
- Fangpyre Viper 
- Hypno Viper
- Unnamed Transparent Blue Viper
- Toxic Viper
- Unnamed Transparent Purple Viper
- Unnamed Transparent Orange Viper
The Serpentine once ruled Ninjago. At some point, Chen had provoked all-out war between the Serpentine and humans, and had even managed to bring several humans to the Serpentine's side, such as himself, Clouse, and the first elemental master of earth. Had it not been for the people of Ninjago and their sacred flutes that controlled the Serpentine, the Devourer would have consumed the land. The Great Devourer was banished to the lost city of Ouroboros and the five serpentine tribes were likewise banished into five tombs. The five Anacondrai generals at the time, including General Arcturus, shared a different fate and were banished to the Cursed Realm, an alternate dimension.
Years later, Lloyd Garmadon, son of Lord Garmadon, discovered and freed the Hypnobrai to get revenge on his uncle and his uncle's students. Freeing the Hypnobrai led to the release of the four other tribes; Constrictai, Venomari, Fangpyre, and Anacondrai.
Pythor P. Chumsworth, the last living Anacondrai, declares himself destined to reawaken the Great Devourer. To do so, he defeated the four generals of the other tribes in combat using a stolen sacred flute, given to him by Skales when no one noticed, and took their Snake Staffs, declaring himself the snake king. All Pythor needed to do at this moment was to find the four fang-blades of the Hypnobrai, Fanypyre, Venomari, and Constrictai tribes.
The Serpentine then found the four silver fang blades and released The Great Devourer. The Devourer ate Pythor and the rest of the Serpentine then realized that it was a bad idea to release it. They quickly go to the Fangpyre tomb and lock themselves inside. Fangtom blames the mishap on Skales, because he was Pythor's right hand man. When the generals hear the Great Devourer has been destroyed Skales takes charge.
However, his first order led the Serpentine to be trapped underground again by the Stone Army. Years after Overlord's defeat, Serpentine tribes became friends with Ninjago citizens and warned them about prophecy of the Golden Master. When Overlord attacked the city in his Golden Master form, with Pythor as his ally, the other Serpentine saved humans by leading them into their underground tomb. Pythor was shrunk by Borg's shrinking power pill, but survived Falcon's attack.
During the events surrounding the Tournament of Elements, Master Chen transforms himself and his followers into pseudo-Anacondrai through the use of a spell. They begin a Second Serpentine War. Pythor, now allying himself with the ninja, reveals to them a spell that would open a gateway to the Cursed Realm, allowing the previous Anacondrai generals to return and take action against Chen's impostors. Garmadon sacrifices himself to activate the spell, and with the gateway opened, the previous Anacondrai generals return in spirit form to curse Chen and his army, sending them all to the cursed realm.
- Hypnobrai - They were kept in an icy terrain styled cave with ice features.
- Fangpyre - They were kept in a graveyard near a mutated tree with two snake-like heads. It is misty and ghostly-looking.
- Constrictai - They were left in the desert in the Mountain of a Million Steps. They were in a dark cave inside the mountain with art and stories drawn on the wall.
- Venomari - These snakes were thankfully in their home the Toxic Bogs. They were kept inside a tree.
- Anacondrai - They were left in a horn shaped rock prison where they starved or got eaten except for Pythor. It had rock walls and was littered with the remains of Anacondrai.
9442 Jay's Storm Fighter
9455 Fangpyre Mech
9443 Rattle Copter
9445 Fangpyre Truck Ambush
9457 Fangpyre Wrecking Ball
853404 Ninjago Magnet Set: Sensei Wu, Fangpyre and Ninja Jay
- The Serpentine can live for a very long time. This is shown when it is revealed that Skales and Fangtom were friends before they were locked in the tombs.
- Despite there being an Anacondrai staff in the TV show, one does not appear in any sets.
Skalidor, the Constrictai General
Bytar, the Constrictai Warrior
Chokun, a Constrictai Soldier
Snike, a Constrictai Scout
Fangtom, the Fangpyre General
Fangdam, the Fangpyre Warrior
Fang-Suei, a Fangpyre Soldier
Snappa, a Fangpyre Scout
Skales, the Hypnobrai General
Slithraa, the Hypnobrai Warrior
Mezmo, a Hypnobrai Soldier
Rattla, a Hypnobrai Scout
Acidicus, the Venomari General
Lizaru, the Venomari Warrior
Spitta, a Venomari Soldier
Lasha, a Venomari Scout