In September 1999, Nintendo published "Sound Picture Box Mewtwo", which included "The Birth of Mewtwo: Pokémon Radio Drama", a CD drama that expands upon Mewtwo's origins. Created by scientist Dr. Fuji, Mewtwo is one of several cloning attempts, which also include Amber, a clone of Fuji's deceased daughter. The young Mewtwo befriends Amber, communicating telepathically; however, the cloning process proves unstable, and she dies. To save the traumatized Mewtwo, Fuji erases its memories and puts it under sedation until its body finishes developing, leading to the events of the film. The CD drama was later adapted into a short anime, and was included with Japanese home releases and broadcasts of "Mewtwo Strikes Back" and later in North America in December 2001 as part of "Mewtwo Returns". Mewtwo as a child is voiced in Japanese by Fujiko Takimoto for the CD drama and Showtaro Morikubo for the anime, while in the English localization the voice actor is uncredited.