This episode article is in need of a synopsis. A synopsis is intended to be a very detailed description of what occurs in the episode.
Don't be selfish, and share with others.
This is the second time that Night Ninja works with the PJ Masks, but it happened later, since they acted neutral and attempted to give advice to Night Ninja and the Wolfy Kids on sharing Mystery Mountain.
The first who worked with the PJ Masks was "Ninja Moths".
Night Ninja meets the Wolfy Kids - Howler, Rip and Kevin - for the first time.
The Ninjalinos reveal to have names when Night Ninja called the Ninjalino that hurt his leg, Marvin.
The Ninjalino that was known as Marvin is also known as Maxime in the French version.
This is the fourth appearance of Mystery Mountain.
This is the first episode to focus on Night Ninja, and the fourth to focus on a villain.
The first was "Romeo's Disguise", the second was "Robot's Pet Cat", and the third was "Moonbreaker".
In one scene, Night Ninja says that the PJs never got the Mystery Mountain Scroll back from him. This references the PJs' first-ever failure from Mystery Mountain's debut episode, though the PJs themselves no longer worry about the scroll in the entire TV series, and the museum presumably has a fake duplicate of it on display.
The Wolfy Kids become the second villains to be at Mystery Mountain.