The Ninjalinos are the Night Ninja's henchmen that assist him during plots.
The Ninjalinos all wear fully-covered purple ninja costumes, similar to Night Ninja's.
The Ninjalinos are very obedient towards Night Ninja's orders. They don't speak in the English language and instead mumble, sing, or laugh. They will also follow in Night Ninja's emotions such as the time he nearly cried in "Owlette's Two Wrongs" because his statue was ruined.
In "Owlette and the Owletteenies", they finally grew sick of Night Ninja's constant demands and criticism and decided to join Owlette. For that episode they were deemed her "Owletteenies". They eventually became disobedient towards her and went back to Night Ninja's service.
- They do talk, but only in high-pitched gibberish that only Night Ninja understands.
- They are basically Night Ninja's helpers, and are wherever he is to cause trouble.
- Similar to Luna Girl's moths, they get pushed around constantly by Night Ninja. In "Owlette and the Owletteenies, their patience wears thin and they decide to join Owlette.
- Their favorite Fantasy Forest animal is a Dusk Bunny.