This episode is the last episode of Season 3 focusing on Catboy.
This is the first time Romeo works with the PJ Masks to defeat another villain.
However, he also threatens Catboy and Gekko, then sends them, Night Ninja and the Ninjalinos flying out of the Sky Factory.
Although Night Ninja and the Ninjalinos are the main antagonists of the episode, at the end of the episode they work with the PJ Masks when Romeo sent the Ninjas and the PJs out of the factory. They briefly work together but only to save each other.
Night Ninja enters the Sky Factory for the first time.