Mount coronet, mt coronet, anthropomorphic pokemon, legendaries, the asteroid, rayquaza, hisui, bunkers

A long time ago, back in the days of when Sinnoh was known as hisui. An asteroid hit mount coronet and all the pokemon became anthropomorphic. When one of the infected pokemon had sex with a human or another pokemon, them too became anthropomorphic. The humans changed into their favourite pokemon. After a year the people of hisui brought it back to normal. After 1000 years of being dormant, the asteroid awoke and this time, the people of Sinnoh couldn't contain it. Pokemon of the sky and sea spread the intention across all eight other regions. The region that we're infected wears in this order: Sinnoh, hoenn, Kanto, johto, paldea, Kalos, unova and Alola. People who weren't infected has to go into underground bunkers protected from any pokemon. When the asteroid was headed towards earth, rayquaza tried to eat it to stop it. But it was infected and was the first pokemon infected. All legendaries and mythicals except for arceus, palkia, dialga and giratina are infected by the asteroid.