FLUDD

The FLUDD (Flash Liquidizer Ultra Dousing Device) is a multi-purpose water pack first used used by Mario ("Super Mario Sunshine"); always worn on one's back, this device's main function is to spray water at enemies and objects, allowing Mario to rid surfaces of graffiti, as well as enhance his acrobatic abilities. There are four different nozzles, for spraying, hovering in the air, blasting upward with a stream of pressurized water, and turbo-boosting. FLUDD seems to possess an artificial intelligence, allowing itself to converse with Mario—though this is never seen or heard in the "Dimension" saga. When it does appear, however, it allows Mario to gain an advantage over Bowser during the Battle of Dinosaur Land, in that a huge blast of water is unleashed which douses Bowser's flames and sends him flying backward, temporarily saving everyone from his wrath. Mario also uses FLUDD to shoot upward and land on top of the mountains, to catch up with everyone and look for Sonic.