Kingstron (キングストロン Kingusutoron?) was a kaiju who appeared in the TV series, The Return of Ultraman. Originally, it was Kupukupu (クプクプ Kupukupu?) before mutating into Kingstron. He appeared in episode 24. * Subtitle: Mansion Monster (マンション怪獣 Mansion Kaiju?) * Kupukupu Subtitle: Small Space Monster (宇宙小怪獣 Uchū ko Kaijū?)