|Inhabitants||Citizens of Ninjago City|
Ninjago City is comprised of many skyscrapers, featuring billboards for advertising businesses. Within the city are small shops, lively subway systems, small arcades, schools, large banks, parks, cafes, and a vast sewer system. On the streets are buses that drive around regularly, and many parked cars along the sidewalks. Among the buildings in the city are the Kiddie Arcade, Marty Oppenheimer School of Performing Arts, Concert Hall, Ninjago Museum of History, Grand Sensei Dareth's Mojo Dojo, and, in the New Ninjago City, Borg Tower and Ninjago City Aquarium.
The Ninja first visited Ninjago City when they detected Serpentine activity in the area. Although amazed by the sheer size of the metropolis, they quickly tracked the snakes to the subway tunnels, where Pythor had gathered the tribes in an attempt to unite them.
During their hunt for the Blade Cup, which contained the second Fangblade, the Ninja visited Cole's father, Lou, in the suburbs of Ninjago City. They subsequently went to the city's Concert Hall to participate in the annual "Ninjago Talent" show, where the Blade Cup was offered as the grand prize.
During a suspicious drought of Serpentine sightings, the Ninja discovered Spitta roaming the alleys of Ninjago City one night. They cornered the Venomari Soldier and grilled him for information about the whereabouts of Pythor and the final Fangblade, only to learn that the Anacondrai was already tracking the artifact halfway across the planet.
After the Great Devourer defeated the Ninjas' Ultra Sonic Raider at Ed & Edna's Scrap N Junk, it headed for Ninjago City in search of more material to consume. Entering via the subway tunnels, the monster emerged in the city square, interrupting the "Take Back Ninjago" rally. An all-out battle erupted when the Ninja arrived, but the Great Devourer was too powerful for them to defeat.
After the Devourer defeated the Ultra Dragon, the Ninja were approached by Lord Garmadon, who told them that the only way to kill the Devourer was to combine the power of all four Golden Weapons - which, coincidentally, only he could do. Reluctantly, the Ninja agreed, giving Garmadon the weapons before distracting the Great Devourer with a mad chase around the city. Eventually, the Ninja successfully immobilized the beast by tricking it into winding its massive body through the streets and alleys of the city and biting its own tail, allowing Garmadon to destroy it by plunging through the weak spot on top of its head.
After the pirates enter Ninjago City, the Ninja try to ward them off.
The Ninja are training Lloyd in Dareth's dojo when a wrecking ball hits the window and the Ninja fall down and when Dareth comes screaming in that it was meant for tomorrow, Nya comes in and tells the Ninja about Ninjaball Run. Then the Ninja start the race in Ninjago City and just beat Garmadon and the Serpentine to the finish line.
After the Final Battle
Much of the city was left in ruin after the Final Battle and Cyrus Borg spearheaded the effort to restore Ninjago City, upgrading it with futuristic technology. Borg Tower was constructed at the site of the Final Battle, becoming an icon as the city's tallest building. It was there that the Hover-car was invented, which became the most common mode of transportation around the city. Borg Industries also designed Security Mechs and Hover-Copters to protect the city and enforce the law.
New Ninjago City became a battleground once again when the Digital Overlord took control of all of Borg's security forces, turning them against the citizens. While the Ninja fended off the mechs and hover-copters, Master Wu helped evacuate a large majority of citizens from the city using the sewers.
Shadow of Ronin (non-canon)
Ninjago City fell under attack by Nindroids once again after Ronin reactivated them. The Ninja, Nya, and Cyrus Borg were able to disable them however, though not before one of the jets crashed into the fireworks factory.