Steve Barkin-A.K.A. Mr. Barkin
Voiced by: Patrick Warburton
School teacher with a running gag that he is the substitute teacher of practically every subject at Middleton High, even subjects he is not particularly familiar with, with Ron once even asking if the school had any other teachers since he appears to be the only teacher there. He frequently chaperones at field trips and school events. Mr. Barkin refers to students by their last names. He works at "Smarty Mart," was the football coach, spent two years of his senior year in high school, and is the son of Franklin Barkin, who bore a strong resemblance to Benjamin Franklin. He is also revealed to have served in a war (presumably the Vietnam War), where he achieved the rank of Lieutenant. His military service would also explain his strict no-nonsense attitude. Mr. Barkin is known to re-grow facial hair at an accelerated rate (Fashion Victim). He also developed a crush on Shego while she was Miss Go (Stop Team Go).