The POW Block is a type of screen-affecting special item that first appeared in Mario Bros. When struck from below, the block would cause an earthquake-like shaking of the level, which damaged all walking enemies. The POW also offered a limited number of uses; after being hit three times, it would disappear. Though it was absent form Super Mario Bros, POW appeared again in Super Mario Bros 2. In that game, it could be picked up and carried, and was activated when thrown. Recently, the POW Block has appeared as a special item in Mario Kart Wii and Super Smash Bros Brawl.