Give credit if you use this! King Ghidorah, the god of the sky, is a giant three headed dragon who was slain by ancient japanese warriors and was sent to sleep in Mount Fuji, where he was hoped that he would rise again to defend Japan. (Space and G to roar)
(NOTE: This is the form of when his wings were folded by his sides. You can stretch them out though, they just need a bit of positioning)