The leader of Taurus Bulba'a henchmen, "Hammerhead" Hannigan is a goat who used his head as a blunt object. Along with his two subordinates Hoof and Mouth, Hammerhead was sent by Bulba to steal the Waddlemeyer Ramrod from the army, and later to kidnap Gosalyn Waddlemeyer.
After Bulba's apparent death, Hammerhead's second and last appearence was In Like Blunt where he turned up as one of the many villains attending Phineas Sharp's island resort to bid on the stolen list of S.H.U.S.H. agents. Although he won the bid (how is a mystery), Darkwing Duck and Derek Blunt switched the real list with a grocery list. Hammerhead was last seen demanding an explanation from Sharp.
In the videogames, Hammerhead Hannigan makes Boss Battle in Disney Adventures : Mickey's Color Adventures, Released a Sega Genesis in 1992 and Sega Game Gear in 1994.
He is voiced by Laurie Faso.