A flashing shell (alternatively flashing Shell or Flashing Shell), also described as a flashing kamikaze Koopa shell, flashing Koopa shell, crazy Koopa, or flashing Koopa Troopa shell, is a type of Koopa Troopa that first appeared in Super Mario World. These shells are only

Artwork of a Kamikaze Koopa in Mario 3D World.
found when there is a yellow Unshelled Koopa that gets into any color Koopa Shell. The Shell will flash a variety of colors and will follow Mario around. If Mario jumps on the shell it will not have the Koopa pop out. It can only be defeated if Mario does a Spin Jump on it or if Yoshi eats it. They can also be defeated by falling into gaps, or using Star power. If a Yoshi does eat it they have three abilities, creating small earthquakes when landing on thr ground, flying, and spitting out Fireballs.
Game appearances[]
Mario 3D World[]
They return in Mario 3D World as enemies.
Mario 3D World Description[]
See a yellow Beach Koopa? Ok. See a shell next to it? RUN!!!