FLUDD
FLUDD (Flash Liquidizer Ultra Dousing Device) is a water pack from Super Mario Sunshine. It can be used by Mario to spray water, by pressing the R button. With this, Mario can perform many tasks from enhancing his acrobatics to cleaning off graffiti.
FLUDD and its nozzles were invented by E. Gadd. FLUDD seems to possess artificial intelligence, and can feel emotions such as joy and fear. Because of this, the water pack acts as Mario's sidekick and guide during his stay on Isle Delfino, giving Mario (and sometimes the player) handy advice.
After Mario's battle with Bowser, FLUDD malfunctions, asking Mario if it was of assistance before it shuts off completely. However, this doesn't spell the end for the sentient water pack; The Toads who came along on the vacation fix it up and return it to Mario. Right as the game ends, FLUDD happily exclaims, "The vacation starts now."
Trivia
When FLUDD scans Mario, a little window in the bottom left corner shows short gameplay clips of various Mario games, such as Super Mario Bros., Super Mario World, and Super Mario 64. After Bowser is beaten at the end and FLUDD is looking at Mario, the window shows "Game Over".
Nozzles
FLUDD is capable of equipping two Nozzles at a time, one of which must be the Squirt Nozzle. The others can be changed by breaking open Nozzle Boxes located at various points in Delfino Plaza and all of its surrounding areas. To change between Nozzles equipped, the player should press the X button.
Squirt Nozzle - The basic Nozzle, which allows Mario to shoot water at enemies.
Hover Nozzle - This Nozzle allows Mario to hover in the air for a short time. Hover Nozzles are located inside blue Nozzle Boxes.
Rocket Nozzle - This Nozzle allows Mario to shoot up high into the air. However, he will fall back down without hovering. Rocket Nozzles can be found inside red Nozzle Boxes.
Turbo Nozzle - This Nozzle allows Mario to run at an extremely fast speed on land, or swim at an extremely fast speed in water. However, turning is difficult when using this Nozzle on land. Turbo Nozzles can be found inside black Nozzle Boxes.
