Showtaro Morikubo
Young Mewtwo (voice)
Kyoko Hikami
Ai (voice)
Yosuke Akimoto
Dr. Fuji (voice) (uncredited)
Satomi Koorogi
Zenigametwo (voice)
小桜エツコ
Fushigidanetwo (voice)
Yuji Ueda
Hitokagetwo (voice)
安達忍
Wife (voice)
Shinpachi Tsuji
Researcher (voice)
Tomohisa Aso
Researcher (voice)
Hidenari Ugaki
Research Scientist (voice)