Nexo Knights (stylized in all caps) is a 3D animated television series that aired on Cartoon Network and premiered in 2015.

They also receive help from the Knightonia Royal family, the digital wizard Merlok 2.0, Robin Underwood, and Ava Prentis.

[3] The Nexo Knights television series was part of a media and merchandising programme that aimed to launch Lego's next major original brand.

[32] It debuted on Cartoon Network in United Kingdom and Ireland on December 19, 2015, as a sneak peek[33] and February 1, 2016, officially.

The knights are a spunky group, and the mix of their very different personalities creates problems in some cases and good examples of teamwork and cooperation in others.

Announced at New York Comic Con 2015, it incorporated thematic elements drawn from both earlier space and castle themes while adding a 21st-century digital spin.

The concept and story of Nexo Knights was the result of a long and thorough development process that involved a significant amount of testing with children around the world.

Senior Design Manager Joakim Kørner Nielsen stated, "When we launch something this big we want to make sure that we have something that is appealing on all the levels and aspects that it's supposed to be for the kids in the right target group.

We kept a lot of icons from the knights: the weapons, armour, horses and castles and added elements such as holograms, computers and hover technology into it.

"[48] Nexo Knights differed from the previous themes by introducing digital integration that connected the physical toys, the television series and video game content.

This was applied by placing 150 knights shields around the kingdom of Knighton that could be found in the construction sets, online content, printed publications and the television show.

Senior Design Manager Joakim Kørner Nielsen commented that this digital integration was the most challenging aspect of creating Nexo Knights.

[75][74] The designers intended the series to act as a thematic replacement for the popular Lego Castle theme, featuring many of the same elements.

In July 2020, Lego Nexo Knights Executive Producer Tommy Andreasen shared a hand-drawn concept sketch for an unreleased set and explained, "The Catapoultry!

Nexo Knights vehicle idea that never happened," and continued, "This was for year three … after Axl would become vegetarian after his ordeal inside the Colossus.

[77] In July 2016, Jestro's Volcano Lair (set number: 70323) was listed as one of Lego's top seven items for Christmas.

"[81] In 2016, General Magmar's Siege Machine of Doom (set number: 70321) was awarded "DreamToys" in the Action Station category by the Toy Retailers Association.

[82] Lego NEXO Knights: Merlok 2.0 was a discontinued action battle mobile game that was released for Android and iOS on December 19, 2015.

The app also used the mobile device's camera to scan QR codes on Lego products, such as web pages, books, toys, and the TV series, to unlock new skills.

[85] The crossover Lego-themed sandbox game Lego Worlds developed by Traveller's Tales and published by Warner Bros. Interactive Entertainment.

[96] In 2016, a Lego Nexo Knights magazine aimed at children aged 7–11 and published by Intermediate Media was launched from January 2016 to accompany the toy line.

[104] On July 25, 2017, DK Books released Lego Nexo Knights Character Encyclopedia, which included an exclusive Clay minifigure.