The Ultra Rotten Spray is a spray in Pikmin 3:Return to the Pikmin Planet. It can be made with any berries, and is impossible to get from eggs or enemies. To make it, take five berries of any color off of a Burgeoning Spiderwort. Leave them out for a day, and they will turn squishy and black. Doodlebugs like berries like these, so pick them up quickly! Using it will make your Pikmin smell REALLY bad. What could be good about this? It gives you an overpowers wretched stench that will make all enemies run away from you, due to the smell. It lasts roughly as long as an Ultra-Bitter Spray. The only exception to this are Doodlebugs, who are attracted to the scent.