Greenmons (New Age of Monsters)

Greenmons is a gamma mutant plant Kaiju that appears in the third season of Godzilla: New Age of Monsters

Origin
Greenmons was originally a normal carniverous plant called the Miroganda that came from Oirisu Island until a group of scientists found it and brought it to Japan as one of them use Gamma Radiation to make it grow, turning the Miroganda into a monster.

History
Greenmons began to attack the scientists that brought him to Japan and murders them by devouring them, leaving nothing but trails of green goonear the killings.