* Though ''Godzilla vs. Gigan'' isn't the first movie to feature both monsters on the same side (they were previously both allies in ''Film/DestroyAllMonsters''), this movie is where the friendship between Godzilla and Anguirus really shows, with the two working together to combat Gigan and King Ghidorah. And, in a strange way, it adds another layer if you consider the Anguirus in both ''Film/DestroyAllMonsters'' and ''Godzilla vs. Gigan'' to be [[DefeatMeansFriendship the same one that Godzilla fought and supposedly "killed"]] in ''Film/GodzillaRaidsAgain''.
** In the Japanese version of "Godzilla Raids Again", it is explained that Angilas, "a peaceful carnivore", hates Godzilla because he's a violent war-mongering monster. Since by this point Godzilla is a straight-up superhero, Angilas would have no problem with him.