Showa: https://soundeffects.fandom.com/wiki/File:Gamera_Roar_(Showa).ogg
Heisei: https://soundeffects.fandom.com/wiki/File:Gamera_Roar_(Heisei).ogg
Toto: https://soundeffects.fandom.com/wiki/File:Toto_Roar.ogg
2015: https://soundeffects.fandom.com/wiki/File:Gamera_Roar_(2015).ogg
Reiwa: https://soundeffects.fandom.com/wiki/File:Gamera_Rebirth.ogg
Variants: https://soundeffects.fandom.com/wiki/File:Monsters_that_use_Gamera%27s_roar.mp3