[blitzlefan]

I'd like to propose... ARCEUS-FIGHTING! (I hope this is on time!)

Arceus-Fighting @ Fist Plate
Trait: Multitype
EVs: 252 HP / 4 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Calm Mind
- Judgment
- Ice Beam
- Recover

ARCEUS-FIGHTING!!! Easily comes in on un-STABbed coverage moves and begins to set up. Few Pokemon resist the combination of Fighting Judgment and Ice Beam, and many opposing teams are caught off guard by the rare Fighting-type and get swept after a few Calm Minds. Calm Mind and Recover are fairly self-explanatory, as the former increases Arceus-Fighting's bulk and offensive prowess while the other extends its longetivity, enough to continue its sweep or stall out Draco Meteors and the such. Judgment is also fairly self-explanatory, as it's Arceus-Fighting's STAB move and hits Arceus-Dark, Arceus-Rock, Arceus-Steel, Dialga, Excadrill, Ferrothorn, and Kyurem-W for super-effective damage. Ice Beam increases coverage, and allows Arceus-Fighting to hit Arceus-Grass, Garchomp, Giratina-A/O, Groudon, Rayquaza, Shaymin-S, Thundurus, and Zekrom. Arceus-Fighting is one of the best offensive checks to Extreme Killer Arceus as well, threatening a 2HKO with a supereffective STAB Judgment. Lastly, Arceus-Fighting is not overly dependant on weather and is rather effective in taking out Ferrothorn (as we have no control over the weather) and most Steel types in general.

It's really late and I have a ton of homework to do, so I'll leave it as this and probably post more tomorrow if I can.