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The Nindroids are humanoid robots based on the design of an intelligent scientist dubbed as Dr. Julien, who constructed the first Nindroid named Zane. Not long after Dr. Julien’s unknown death, a brilliant inventor built Borg Industries at the location where the Golden Ninja defeated the Overlord; little did he know the Overlord had become a digital version of himself, corrupting Cyrus’ assistant, an android named P.I.X.A.L., plotting to scan the White Ninja to create an army of himself: the enhanced Nindroids.
The first known Nindroid was Zane, who was built in Dr. Julien's Hidden Workshop. Initially a blank slate, Zane learned new skills from his creator, who gradually came to see the Nindroid as a surrogate son. Before passing away of old age, Dr. Julien deactivated Zane's "Memory Switch" to spare him the pain of losing a loved one, causing Zane to believe himself to be an orphan. Eventually, Zane discovered his true heritage and reactivated his Memory Switch, coming to terms with his past and unlocking his True Potential.
An army of Nindroids act as the main antagonists of the 2014 Ninjago: Rebooted season. These Nindroids are created at Borg Tower to take over Ninjago City, led by General Cryptor. They were created by Cyrus Borg following his possession by the Digital Overlord, using Zane's blueprints (as scanned by P.I.X.A.L.).
There are still a number of operational nindroids hard-coded to serve The Overlord. Some are imprisoned within Kryptarium Prison, while others have been reprogrammed by Ed and Edna and Cyrus Borg to do good, with the occasional mixed results.
- General Cryptor (Leader of the Army)
General Cryptor was one of the many Nindroids designed by the Overlord, and served as their commander. Cryptor found himself at odds with the original Nindroid, Zane, whose design inspired his. Cryptor and his allies fought to stop the Ninja from erasing the Digital Overlord from the Digiverse. Despite failing to do so, Cryptor and the Nindroids claimed the Golden Weapons, which allowed for the birth of the Golden Master. During his assault on the city, Cryptor fought against Nya, and was frozen when Zane sacrificed himself to defeat the Golden Master. Subsequently, Cryptor was destroyed after shattering apart.
Nindroid Warriors are advanced combat robots designed by Cyrus Borg under the Digital Overlord's influence, and form the heart of the evil Nindroid army.
The Nindroid Drones are the basic foot soldiers in Cyrus Borg's Nindroid Army.
Min-Droid is a member of the Nindroid Army created in Borg Industries. He is a Nindroid Warrior that was indirectly created shorter than the other Nindroids as a result of not enough metal, leading General Cryptor to give him the nickname "Min-Droid."
- The Nindroids were also featured as enemies in the non-canon game LEGO Ninjago: Shadow of Ronin.
- The word "Nindroid" is a portmanteau word composed of "ninja" and "android."
- The Nindroids are the first antagonistic group that Garmadon had no affiliation with.
- In Season 6, the Nindroids have a new security outfit, that is predominantly white where black used to exist.