Swipin' Stu

From the Super Mario Wiki

A Swipin' Stu is a variety of Strollin' Stu that appears in Pinna Park after completing a certain mission. They resemble larger versions of Flying Stus with green pants and a mustache. If the player looks closely, he'll see that it has darker skin also. They attack when Mario walks under one. It'll try landing on him and if he succeeds, he'll steal Mario's cap. Mario will slowly get hurt as if he was drowning and if he does not kill the Stu and get his hat back before his health runs out, he'll die.

Super Mario Sunshine Characters
Mario | Peach | Toadsworth | FLUDD | Pianta Attorney | Pianta Captain | Pianta Judge | Doot-Doot Sisters | Sunglasses Salesman | Delfino Police | Big Daddy | Noki Elder | Sand Bird | Great Sunflower | Il Piantissimo
Super Mario Sunshine Bosses
Shadow Mario | Petey Piranha | Gooper Blooper | Wiggler | Mecha Bowser | Phantamanta | King Boo | Eely Mouth | Chain Chomp | Bowser Jr. | Bowser
Super Mario Sunshine Species
Bee | Blooper | Bob-omb | Bombshell Bill | Boo | Bullet Bill | Butterfly | Cataquack | Chain Chomplet | Cheep-Cheep | Coo Coo | Dune Bud | Electro-Koopa | Isle Delfino Birds | Jumping Blooper | Klamber | Missile Bill | Noki | Pianta | Pink Boo | Piranhabon | Piranha Plant in the Generator | Plungelo | Pokey | Pokey Sprout | Poink | Seedy Pod | Skeeter | Sleepy Boo | Smolderin' Stu | Snooze-A-Koopa | Soarin' Stu | Strollin' Stu | Sunflower Kid | Swipin' Stu | Swoopin' Stu | Tanooki | Toad | Wind Duppy | Yoshi