The first Grodzilluh fought Godzilluh during the later years of the Fakegee War, leading the charge with a large army of Greatures. Godzilluh fought and later brutally killed Grodzilluh by tearing the Greature's heart out, ending its life once and for all. Strangely, another Grodzilluh has emerged. It's not known how or why this has happened, but it's possible that this is through exposure to other Greatures or Greegees.