Bowser Jr.

Bowser Jr. is the primary antagonist of Super Mario Sunshine Bloopers.

Characteristics
Bowser Jr. is the son of Bowser (obviously), however, he is stated as being a clone of Bowser in Super Mario Sunshine Bloopers. He has the ability to turn into Shadow Mario, a mysterious doppelganger of Mario who wields a magic paintbrush-type device that can create graffiti and all sorts of goo.

Trivia

 * As Shadow Mario, he speaks with a deep Dr. Claw-esque voice.