Shadow Mario is a character from the Super Mario video game series, specifically appearing in Super Mario Sunshine. He is a dark, shadowy version of Mario and serves as an antagonist throughout the game. Shadow Mario is known for his mischievous behavior, often causing trouble in the tropical setting of Isle Delfino. In the game, Shadow Mario is revealed to be the alter ego of Bowser Jr., the son of Bowser. He uses a paintbrush to create graffiti and frame Mario for the pollution affecting the island. Players must chase and confront Shadow Mario to restore peace to Isle Delfino.