Wiggler

Wiggler is the fourth boss in Super Mario Sunshine 2.

Description
Wiggler looks almost identical to the enemy of the same name. The Wiggler boss is about 10x larger, and is green instead of yellow.

Wiggler Ahoy! Full Steam Ahead
In this first fight, Wiggler runs around Gelato Beach, knocking everything out of it's way, including Mario. There is a pattern to its movements. Once the player sees Wiggler coming towards them, they must use fludd to burst open a Dune Bud close to the boss, causing it to flip over and allowing Mario to ground pound on it. This must be done three times to defeat it.

Wiggler Wiggles Again
The second fight is similar to the first fight, except after each attack, Wiggler becomes much faster, but is still defeated in the same way.