Boom-Booms are a hulking, brutish variety of Koopas from the Super Mario video games. Originally appearing in Super Mario Bros. 3, a Boom-Boom would appear as the boss of the fortress stages in the various lands of the Mushroom World, attacking by charging at Mario and flailing their arms wildly. They were also capable of leaping impressive distances and some could even sprout wings and fly. Mario could easily defeat a Boom-Boom by jumping on its head three times or assaulting it with fireballs or hammers.
In Super Mario 3D Land, Boom-Booms make their long overdue return. As well as charging at Mario, they also perform a lariat-style spinning attack, outstretching their arms and spinning rapidly like a top.