Leatherhead is the final boss of Teenage Mutant Ninja Turtles: Dark Horizons. He also appears in Teenage Mutant Ninja Turtles: Sewer Run, as it is the direct sequel of Dark Horizons. In later games such as Danger of the Ooze, Teenage Mutant Ninja Turtles Legends and Teenage Mutant Ninja Turtles Arcade: Wrath of the Mutants, he is more like his 2012 TV series incarnation, including functioning as an ally and a member of the Mighty Mutanimals.
Leatherhead in Sewer Run