Book

Cheatos are ghostly library books only found in Creepy Castle's library which can only be accessed by Donkey Kong. When Donkey Kong triggers a switch, it opens a secret passageway. Once he gets to it, there is a path that leads to a Golden Banana, but several Cheatos are flying through the walls blocking the path. Donkey Kong must use the Strong Kong ability to pass the flying Cheatos. Cheatos cannot be defeated, they can only be passed by. They only appear in Donkey Kong 64.

Trivia

 * If Donkey Kong is blocking the path of a Cheato, it'll just glare at him and disappear rather than fly through him despite the fact that they can fly through solid walls.
 * The attack pattern of Cheatos is similar to the Bookends of Super Mario 64 DS and Super Mario 64.
 * The Cheatos look similar to the Banjo-Kazooie character, Cheato. They even share the same name.