Legendary Origins The 3 Kaiju Waves

This is to clear up some questions about the origins I am giving some of the monsters. So here is the 3 waves origin. There are 3 main waves of when monsters came to the Earth. There was the obvious 1st wave of giant radioactive monsters before the dinosaurs. This era was the time of Godzilla, Muto, and other radioactive monsters lived. Then there is the second wave that took place during the Creatacious Era. This was the era of smaller monsters that relied more on their own strength and less on regeneration and atomic breaths. This era was when monsters like Anguirus, Varan, and Titonosaurus came. Then there is the 3rd wave. The 3rd wave is the age of man-made monsters. With humans becoming more and more dominent they have started to make monsters of their own. There are the mecha and there are the organic experiments. This era made MehcaGodzilla, Hedorah, and Biollante. So there you go. This is just to clear up any questions. I put the radioactive and large monsters in the 1st era, the smaller monsters in the 2nd era, and the mechas and other man made monsters in the 3rd era.