Two of the biggest, baddest villains in the series [going by video game canon here]. But who do you think is the most villainous? Giovanni, the mob-boss of the Pokemon world, that mysterious Ground Gym Leader who may have had a hand in the development of Mewtwo? Or perhaps Cyrus, the genius, very logical fellow who favored knowledge over emotion, seeking to use that knowledge in an ambitious attempt to reconstruct the universe.
Personally, I think Cyrus is more evil, because of how crazy and far-gone he is. While I agree with his initial ideas about humans becoming cruel, and the world needing a change, I think that forcibly removing crystals from the lake fairies [who, by the way, gave humans their good qualities in the first place] and enslaving the creation dragons to do his bidding is way too extreme a plan.
Giovanni has always been in it for the money and the power, though. But while his plans were criminal from the start, I feel like at least he knew when to stop.
Sorry for such a dark thread, but I'm curious to hear what the rest of you folks think.