 Doctor Nefarious Tropy is a henchman and old friend of Uka Uka and the self-proclaimed master of time.He was created by Naughty Dog as a time-traveling boss that would fit in a time-traveling plot.Charles Zembillas drew the first sketches of Tropy (and the doodle he created as Naughty Dog was describing the character to him) on January 22, 1998.