Kazuhiko Aoki has been involved in the development of a number of video game titles, including the mainline Final Fantasy series, Chrono Trigger, Final Fantasy Crystal Chronicles, the Chocobo's Mystery Dungeon series, and Dragon Quest X Online. Toshiyuki Itahana creates character designs as a starting point for worldbuilding in video games. His most notable works include the Chocobo's Mystery Dungeon series, Final Fantasy IX, and Final Fantasy Crystal Chronicles, among many others.