Twistys resemble little floating UFOs with white skin, round bodies, and a bow on top of their heads.
Twistys float up and down, vertically, when they're not threatened. When approached, they will start to spin around really fast to prevent the Kirbys from attacking it. If they touch Twisty while it's doing this, the Kirbys will take damage. After spinning, it'll get dizzy, giving the Kirbys a chance to defeat it. There also exists a large counterpart known as Grand Twisty.