Polluto-bombs are bombs designed to cause pollution in a small area. They were invented by Tyson Dense and were to be used in the League of Super-Evil Villains' plot to rob the Metropolis Zone Central Bank. Unfortunately, a rough landing from The Leaf caused one of the bombs to go off early. Despite being a great lover of pollution, Dense went green and was almost sick due to the smell from the pollution, although no mess could be seen.