Without villains, the world would be pretty dull. There wouldn't be any heroes, the lycra industry would collapse and only ageing sportsmen, indie kids or French butchers would grow moustaches.
There would be no-one to save the world, no one to blow it up and generally very little to do. So give thanks for these guys - the biggest, hardest, jerkiest jerks in gaming history. Plus Dr Wily.
Obviously there will be some spoilers here, you have been warned.