Today's the third day. :> Although, it's still early in the morning though. Guess the mods don't get on in this section much. xD
It's about an alien plant-like thing called Mekranom that spreads and corrupts the ground across the world. It spreads underground through vine/root-things and makes the dirt black. It gives off radiation that kills humans and plants, but mutates Pokemon (not sure about what'll happen to plant Pokemon though <.<) And when it really takes root in an area the place starts looking like the surface of an alien planet, with large chasms and gigantic towering purple things the size of skyscrapers.
Oh, and there's also Team ReGenesis who worships the stuff as the next stage in human evolution. That's pretty much it summed up in a nutshell.