MnSG
Cosmic Beauty
Dr. Javelin said:STAB ExtremeSpeed is the reason Arceus-Normal is the primier sweeper in Ubers.
Just one Swords Dance, and you can OHKO or 2HKO everything in the game with it. And he also gets Shadow Claw to take out Giratina, and Earthquake to take out Dialga.
It's too bad that that leaves the Multitype ability practically useless. On the other hand, because Arceus has to utilize plates to change its typing, only Judgment would be able to take advantage of the plate's power boost.