Super Mario Sunshine Cheats

WaterMelon Festival
In this level of Gelato Beach you can get the duck things to follow you to the pier and about half way up to the juice stand walk of the pier. The ducks will turn around and walk into the water and die, they will not return.
I have also gotten the "ducks" to follow me off the upper ledges and fall to the beach, then I again led them to the pier. This takes a little more time the all the ducks on the beach, but works just as well.