A cat-like Darkner who is secretly a Shadowguy in a cat costume. Acts as "Mike" for Tenna, alongside Small Mike and Cowboy Hat Mike. The quietest of the trio by a good margin.

Despite popular misconception, the character's minigame is called "Pluey," and not the character itself. This can be seen on the Nintendo Switch 2 version of the game, where Small Mike allows you to play the game "Pluey" instead, and in dialogue where Small Mike will refer to the character as "Cat Mike" when you have the highest score in the latter's minigame.