Derek is a major antagonist of the Disney XD series Milo Murphy's Law. He served as a supporting antagonist in the hour-long special "Missing Milo", and the main antagonist in the episode "Fungus Among Us" and the hour-long special "The Phineas and Ferb Effect".
He was a Pistachion who was one of the sons of King Pistachion.
Disney Vs Non-Disney Villains War (H0rr0rfan Version)[]
Vs Kent Mansley[]
Kent Mansley has heard rumors of unusual happenings going on in Danville. Knowing of the events of The Pharmacist near-apocalypse, Kent is taking no chances and brings a large army with him. When he gets there, he finds the city a botanaphobe’s worst nightmare: covered with plants and populated with pistachio monsters. He’s confused until he sees the leader of the living pistachio, who he witnesses proclaiming his intentions to turn humans into Pistachions with his M.U.L.C.H. machine, upon which he commands his men to attack. However, they all get flung around by the giant Pistachion before Kent himself is turned into a Pistachion, followed by the rest of the army.