How to get the rocket nozzle in Gelato Beach?

I'm curious, could you elaborate on the steps required to obtain the elusive rocket nozzle in Gelato Beach? Is this an item that's hidden within the game's environment, or do you need to complete a specific quest or challenge to acquire it? I'm intrigued by the prospect of this powerful tool and would love to know more about how to go about acquiring it. Any tips or tricks you can share would be greatly appreciated!