Kitten

Cats are major entities appearing in Super Mario 3D World + Bowser's Fury, more precisely in the addition Bowser's Fury. They can be seen on most of the various islands composing Lake Lapcat, an archipelago totally dedicated to them. They exist in five different colors: green, reddish pink, blue, black and calico, each of them except the last one referencing to a specific character's Cat form color: respectively Luigi, Peach (although the color is not totally the same), Toad, and Rosalina.

Cats have two very distinct states: normal and fury. They change of state depending on if Fury Bowser is active or inactive. Normally, cats are friendly and sometimes even caress on Mario, or relax and groom themselves. However, when Fury Bowser awakens, cats become also fury and mutate from their normal phase. During this state, every cat becomes black with red eyes and ears, along with a red aura. Moreover, along with getting impacted physically, this state makes them become nasty and aggressive: when Mario comes near one of them, it will not hesitate to dash toward him, similarly to how Fish Bones function from New Super Mario Bros. Wii.

According to the trailer, there exists a bigger variation of a calico cat. Strangely, a calico cat is only seen big, whereas other colors are only seen small. It is unknown if the big calico cat is a specific character, though it can be seen at the same place on multiple screenshots.