The Turbo Nozzle is an item in Super Mario Sunshine which Mario can find and use in each of the worlds. It causes Mario to move around on the ground or in the water at incredible speed once it is fully charged until Mario hits a wall or runs out of water in the F.L.U.D.D. pack if used on land. Mario can eventually unlock the Turbo Nozzle to use in Delfino Plaza to access areas such as Turbo Track by the police station.
This Nozzle is not available from the beginning of the game, though. In order to obtain it, Mario must chase Shadow Mario around Delfino Plaza. Once spraying Shadow Mario enough times, he will give up and gives Mario the Turbo Nozzle. Mario can then get a secret Shine Sprite by blasting through the doors of a building using the Turbo Nozzle's ability. The Turbo Nozzle can be found in any gray-colored box with the Professor E. Gadd logo on it.