Bob Sessions

Nick's Father / Meanest Monster in Monster Land / Mr. Bad / Gomora / Lobster Men / Geronimon / Dorobon (voice)

Nicholas Curror

Nick

Sarah Taunton

Nick's Mother

Wendy Danvers

Edmund's Wife / Nick (voice) / Ultra Mother (voice)

Marc Smith

Various Ultras / Hanuman (voice) (uncredited)

กาญจน์ บุญชู

Bandit (uncredited)

ปรีดา สมทบสุข

Bandit (uncredited)

Jan Wanpen

Bandit (uncredited)