Aspheera was originally going to be called "Venom Le Drip". She was also going to be a Hypnobrai.
King Mambo's name, Mambo the Fifth, is a reference to the popular song "Mambo No. 5".
The character Clutch Powers from the direct-to-DVD movie Lego: The Adventures of Clutch Powers (2010) appears as a character of the show.
The character of Scott was named after the deceased Ninjago: Masters of Spinjitzu (2011) producer Scott Godon-Decoteau.