Black Gon (ブラックゴン Burakkugon) is a Kaiju who appeared in the series, Mirrorman.
Subtitle: Space Monster (宇宙怪獣 Uchū Kaijū)
Gon was a black cow from outer space that was found by a farm boy named Makoto in the Asagari Plateau. One day Kyotaro and Asako visited the region on vacation, the latter knowing Makoto. During their stay a farmer noticed that one of his cows was dragged off by something black and noticed a decrease in the wild dog population. Makoto took Gon into a cave to protect her, unaware an Invader was watching them. Kyotaro found Gon and was attacked by the nearby Invader. Once the attacker fled, Kyotaaro believed they were the ones responsible for the recent cow attack. Makoto went looking for Gon who had escaped the cave, eventually taking his frustration out on Kyotaro. Makoto soon caught a fever and had to be returned to his home, all the while thinking of the time he spent with Gon. Meanwhile, Kyotaro is alerted of an Invader space ship that appeared twice in the Asagari Plateau. Murakami believed the Invaders were interested in mutating Gon for their plans. Kyotaro and Asako eventually found Gon in the woods just as a red flying saucer appeared. The Invader from earlier attacked Kyotaro again, leading him away from the space cow. The attacker was eventually punched into a lake while Makoto found Gon.
The red flying saucer emitted a green energy beam from its underside to turn Gon in Black Gon. The mutated space cow emitted mouth flames across the pasture while Makoto was unable to snap Black Gon out of her new state of being. Kyotaro led Black Gon away from the others while he transformed into Mirrorman using the nearby lake. Mirrorman quickly overpowered the mutant space cow, Makoto worried about her safety hoping the hero would not kill her. Black Gon eventually knocked Mirrorman down and tried to bash him with her whips. The fight continued on with the hero barely able to keep Black Gon at bay. The hero asked Makoto to forgive him as he decapitated Black Gon with the Miracle Kick much to the child's horror. At dusk Makoto mourned the loss of his friend at the lake.
- Height: 48 m
- Weight: 42,000 t
- Origin: Space
- Powers and Weapons
- Flames: From her mouth, Black Gon can fire a deadly stream of flames.
- Arm Whips: Black Gon has a whip for each arm.
- Blinding Mist: Black Gon can emit blinding mist from her mouth.
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