[Sephiroth]

I'm terrible at actually making the exact plots of stories, but if someone else actaully takes charge, I'll supply an idea.

Basically, team rocket demands world domination, and if the world leaders refuse, they will "release a virus that will change the face of the earth" They're not taken seriously, and several days later, people start coming down with serious flu like symptoms, and wake up as human/pokemon hybrids.