Goombas are villains in the Super Mario world. However, once they lived in peace with the Toads in the Mushroom Kingdom at an unknown track of time, they changed and joined the Koopa troop. Goombas are not really dangerous and can be easily defeated, simply by jumping on top of them would stop one. In the super mario movie, the goombas are very different in design and characteristics. They look reptilian which is far different than their Mushroom origins.