Looks good
Mr.lol! What I meant about poor offensive coverage was that His STAB Psychic-type attacks aren't that good in Ubers,
especially with Psyshock. Your added information on Focus Blast works great though. Anyway, just a few prose nitpicks and this overview should be ready to go!
Arceus-Psychic
...
Watch the impossible become reality when Arceus attaches His Mind Plate. In His serene forme, Arceus embraces a paranormal Calm Mind set which can strike special walls and Calm Minders where they are weakest. With the use of STAB Psyshock, not even His creations Blissey or Chansey can withstand His telekinetic onslaught. Though Mewtwo, mere creation of mortals, has offenses that surpass even Him, His supernatural bulk allows Him to set up with greater ease. In fact, Psychic Arceus can prove an extraordinary utility counter to that very same Mewtwo, for He is more than capable of repelling its obscene might. He also easily deals with His Fighting-type creations. Disappointingly, His resistances to Fighting- and Psychic-type attacks end there, for He cringes at the sight of Bug-, Dark-, and Ghost-type attacks. His STAB Psychic-type attacks are also appalling offensively, forcing The Creator to rely on the inaccurate Focus Blast for coverage. Even then, His creation Lugia, The Guardian of the Sea, walls Him for eternity. Regardless, the feats of The Original One are still beyond the mind, beyond imagination, beyond reality.
NOTE: For the Lugia sentence, the
His creation can be removed if necessary.
P.S. So that's where your Cocytus reference came from :P. Should have known...