Water rocket

Water Rockets are items in the game Super Mario Sunshine. Water Rockets can be found in two missions in Pinna Park. In Episode 1, Mario can pick these up with F.L.U.D.D. while riding the roller coaster. They are used in the fight against Mecha Bowser. The mechanical monster will fire Bullet Bills at Mario, which can be destroyed using Water Rockets. Mecha Bowser is defeated after being hit with the Rockets four times.

Later, in Episode 8, they are used to pop balloons that bear the likeness of Bowser Jr.