Mini Goomba
Micro-Goomba is the name given to a species of small Goombas. In Super Mario Bros. 3, some Paragoombas would drop Micro-Goombas onto Mario and Luigi, which highly weakened their ability to Jump temporarily. These debilitating pests were also known as Mugger Micro-Goombas. A similar species called Goombettes are found in Super Mario RPG: Legend of the Seven Stars.
They also appear in Super Mario 64's Tiny-Huge Island. They appear in the tiny side, and if they touch Mario, he will not get hurt, only knocked a few feet back, but the Micro-Goombas will die.
They reappear in New Super Mario Bros.. When Mario is Mini Mario, he can enter miniature pipes. If he enters one, Mario may find a Star Coin. However, in some cases, Micro-Goombas are in the way, and Mario has to bop them on the head to get to the Star Coin. In this game, Micro-Goombas possess the intelligence of any other Goomba, but can be more dangerous, because it only takes one hit to defeat Mini Mario.