Baxter Stockman

Baxter Stockman is a brilliant but mad scientist, often allied with the Shredder and/or Krang. In almost every version, he is depicted as the creator of the Mousers, and as an enemy of the Ninja Turtles. In most incarnations, he is forced into an alternate form (either converted into a cyborg, or mutated into a fly) that causes his sanity to erode even further.

Baxter Stockman, a man with the mind of a scientist and the body of a common housefly, buzzes around town, annoying the Turtles and other decent reptiles. Created accidentally in Dimension X by a malfunctioning disintegrator unit, Baxter flurried himself into an avenging frenzy, ready to fly up anyone's nose. Finally convinced by Shredder that the Turtles were solely responsible for his rebirth as an insect, Baxter now vents his hostilities toward our half-shelled heroes. Armed and winged with the Anti-Turtle Swatter, Baxter swats the shell out of the Turtles. His scientific experiments may break a few beakers, but Shredder can always use a fly with evil ingenuity.