Mario Stonewell

Mario Stonewell is Koreo's 98th Street School counterpart and a fifth (later sixth) grader and one of Dawson's friends. He’s a bully and jock. He‘s big and fat, has ginger hair, and wears a purple shirt. He likes grilled cheese sandwiches. Being around as large as Beaver or Shulman, he tends to use his size to intimidate others.

He doesn’t appear in as many episodes as Dawson's other friends and doesn’t usually make cameos or appear on his own without Lawson, unlike Jimbo, Jasper, Frankie, and Joey.