Mimicuties were introduced in Kid Icarus: Uprising. They appear as standard chests at first, but when approached, they sprout legs and proceed to run around and perform kicking attacks. They have two main attacks: a flurry of rapid kicks and a sliding whirlwind kick, both of which carry over to Smash 4 essentially unchanged.
Mimicuties appear as enemies. They disguise themselves as chests, only differentiated from them by their lighter color and the fact that they face towards the screen, and are intended to trick players into thinking they are real treasure chests. If a character approaches a Mimicutie, it will sprout a pair of legs and start attacking, actively and very quickly pursuing the player if they try to run away. They can attack either with a flurry of kicks or a powerful spinning slide, similar to that of Kritter. Due to their considerable health, flinch resistance and powerful attacks they are difficult to defeat, though managing to do so gives players substantial rewards similar to an actual chest.
Mimicutie appears as a Spirit for the game's Spirit mode.