Nidoking, a pokemon which after the glory it had in G/S/C with OU tier status, finds itself relegated to UU. It dislikes this tier, finding the inhabitants too weak for its liking. It has once again set its eyes on competing in OU, this time not as a sweeper, however. DP's Nidoking is a different breed, a Nidoking focused on killing practically all the OU walls in one to two hits with SR up. Let's take a look:
Nidoking@Life Orb
252 Atk/174 Sp. Atk/84 Speed with a Lonely/Naughty Nature
Fire Blast
Ice Beam/Blizzard if used on a hail team
Megahorn
Earthquake
This speed allows it to outspeed no Speed Cresselia, who otherwise may threaten to annoy Nidoking with Ice Beam as well as no speed Gliscor, who threatens EQ. You also outspeed Adamant Tyranitar with max speed EVs, as well as any neutral base 60 or less poke. The maxed attack stat and near max Sp. Atk are for swift kills on the walls.
Poison point is the trait of choice, because Nidoking is always male and Cresselia and Blissey are always female and Rivalry lowers attack versus the opposite gender.
Now, you may be asking "Why Nidoking?" "Why not Ape or BOAH?" The answer is that Nidoking is immune to two very common statuses, has a great immunity, and gets a nice range of resists. In addition to that, it can also suck up Toxic Spikes.
Now then, I'm not expecting you to join the Nido side quite yet, not without calculations, that is. For all these pokemon, I shall be using the first set of the Smogon analysis. All calcs are done using Metalkid.
Nidoking versus Blissey(148 HP/252 Def Bold) with EQ:
48.84% - 57.56% SR not needed in majority of cases.
Nidoking versus Skarmory (252 HP/0 Sp. Def Impish) with fire blast:
95.81% - 112.57% OHKO always with SR, OHKO in most cases without it.
Nidoking versus Cresselia ( 20 HP / 252 Def Modest) with Megahorn:
54.15% - 63.73% 2HKO with or without SR including LEfties.
Nidoking versus Gliscor 252 HP/252 Def Impish with Ice Beam:
135.88% - 159.89% Overkill.
Nidoking versus Weezing 252 HP/252 Def Bold with Fire Blast
47.90% - 56.29% SR not needed in majority of cases.
Nidoking versus Dusknoir 252 HP / 76 Def Careful with EQ:
46.60% - 54.76% SR kills this off.
Nidoking versus Bronzong with 252 HP/96 Sp. Def Relaxed with Fire Blast:
57.40% - 67.75% SR not needed. (If you do way less than this, feel free to EQ for the OHKO)
Nidoking versus Milotic 148 DP/228 Def Bold with EQ:
43.48% - 51.09% 2hko with SR in vast majority of cases.
Nidoking versus Tangrowth 252 HP/+ Def with Fire Blast:
101.98% - 120.05%
Hippowdon and Donphan are both 2HKOed by Ice Beam. Forretress is always OHKOed by Fire Blast.
As we see, all the common OU walls are destroyed. There is just one who is not killed in one-two shots by Crushking, and that's Swampert. However, Swampert cannot come in repeatedly. Now, for your pleasure, a list of attacks versus Nidoking (I'll regularly be updating this list, so there won't be much right now):
Cresselia Modest 232 EV Ice Beam: 65.68% - 77.23% , No EVs is 45.87% - 54.13% (If it's sleeping and it Ice Beams you, you won't die)
Heracross with 252 Attack EVs Adamant Choice Band Close Combat: 64.69% - 75.91% (You don't counter it, but you can stop the sweep)
Lucario Adamant with 1 SD 252 Attack Close Combat: 78.55% - 92.41% (Same as above)
Celebi with HP Ice 0 Sp. Atk: 42.90% - 50.50% Eh, this turns into a one for one deal then, you survive almost all the time, but Life Orb recoil will probably kill you along with Celebi. You can always come in on Leech seed and Thunder Wave, however.
I recommend pairing Nidoking up with a Grass type and/or a Wishpasser to get maximum mileage. Unlike Infernape, Nidoking doesn't get hurt badly by Sandstorm, so you can expect to live for a bit even with Life Orb. After you kill the common walls, you can get some more use out of it by killing some sweepers, like Scizor and Lucario.
So that's that, Nidoking is a viable wallbreaker for the OU environment, and I hope you consider it. Be sure to tell me of any errors and I'll fix them up as soon as possible.
-Light