Quoted By:
Been working on an Arthurian fantasy pokemon setting for tabletop gaming recently, so this thread should be pretty useful for me to steal ideas out of.
>18,500 years ago
-Eternatus invades the atmosphere, and battles Rayquaza to a draw. It falls to the earth and enters a coma as Rayquaza roosts on the top of Sky Pillar to recover from the battle. The impact of Eternatus upon the planet causes a world-wide volcanic winter, and a subsequent Ice Age.