Phineas Sharp is a one shot character that appeared episode 150 "In Like Blunt." Arch-enemy of Derek Blunt, Phineas Sharp was an evil, twisted vulture (literally) who wanted revenge on both Blunt and S.H.U.S.H. for an earlier humiliating defeat. He stole the master list of S.H.U.S.H. agents, so that he could lure Blunt to his island resort in the Salad Sea, hoping to make the elder agent's erstwhile retirement "permanent."
Having the list of SHUSH agents, Phineas planed on auctioning off the the list to highest bidder. To do this Phineas invited villains to his island resort. His scheme was foiled by Darkwing Duck and Blunt, who switched the real list with a grocery list taken off of Horatio. Sharp was last seen being threatened with a pounding by Hammerhead, the buyer of the agents list.
As of late, Sharp has been recruited by FOWL to serve as a member of the Villain League.