From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Mimicutie&oldid=2185864"
Mimicutie is an treasure chest enemy that appeared in Kid Icarus: Uprisng. It will disguise itself as a treasure chest first and will sprout legs if Pit gets close to them. When they sprout their legs, they will start running around and perform kicking attacks.
Mimicuties also appear in Super Smash Bros. for Nintendo 3DS as Smash Run enemies. Like in the original game, they disguise themselves as chests first and will reveal their true form if the player gets close to them. They can chase the player if they run away from them and travel very fast. They will attack the player by wildly kicking, performing an uppercut, and slide spinning. They have a lot of health, an inability to flinch, and powerful attacks, making them difficult to defeat. But if they are defeated, they can give out substantial rewards.
Super Smash Bros. for Nintendo 3DS Trophy information