Sleet is a bounty hunter in Sonic Underground. Sleet is cunning, greedy and manipulative. He was once an independent contractor partnered with the idiotic Dingo, but Robotnik 'persuaded' them to work exclusively for him. His task is to hunt down the Sonic Underground band (Sonic, Manic, and Sonia). Because of Dingo's incompetence, Sleet often uses him only for his useful ability to change into anything with the touch of Sleet's remote, while Sleet thinks of and plans the missions to stop the Sonic Underground. Sometimes he and Dingo think of plans that make them turn on Robotnik, but these never go well.
He is a surprisingly competent villain, often remaining level headed and is genuinely dangerous to the Sonic Underground, although this danger is often counteracted by Dingo's stupidity. He is voiced by Maurice LaMarche, who is more known to be the current voice of Professor Ratigan and Basil of Baker Street from Disney's The Great Mouse Detective.