Meh, I've been having a bit of fun end-game sweeping by bp'ing Shell Break to Nidoking using Huntail and a white herb, using something along the lines of this:
Nidoking @ Life Orb
Ability: Encourage
Nature: Naïve (+Spe, - SpD)
72 Att | 184 SpA | 252 Spe
~ Earth Power
~ Fire Blast/Flamethrower
~ Thunderbolt
~ Poison Jab
Some damage calcs to show how retardedly strong this is if it gets the shell break:
POISON JAB
+2 Poison Jab vs 20|252 Calm Blissey: (88.26% - 103.96%) (ohko w/ sr)
+1 Poison Jab vs Salamence: (79.76% - 94.26%) (ohko w/ sr)
w/o Intimidate: (106.04% - 125.08%)
+2 Poison Jab vs 0|0 Lati@s: (106.64% - 125.58%)
+2 Poison Jab vs Bold 252|252 Latias: (62.09% - 73.35%)
+2 Poison Jab vs 0|0 Sazandora: (98.77% - 116.31%) (ohko w/ rocks)
+2 Poison Jab vs 0|0 Ulgamoth: (133.44% - 157.56%) (bug doesn't resist poison)
+2 Poison Jab vs 28|226 Wobbufett: (62.69% - 73.86%)
EARTH POWER
+2 Earth Power vs 252|4 Hippowdon: (108.57% - 127.86%)
+2 Earth Power vs 0|0 Garchomp: (111.76% - 131.93%)
+2 Earth Power vs 0|0 Kingdra: (125.09% - 147.42%) (w/ max speed and naïve you tie w/ +spe swimmers)
+2 Earth Power vs 252|0 Tyranitar: (114.85% - 135.64%)
+2 Earth Power vs 252|252 Careful Tyranitar: (83.17% - 98.02%) (about 2/3 chance to ohko w/ sr)
+2 Earth Power vs 28|252 Calm Wobbufett: (65.91% - 77.84%)
+2 Earth Power vs 252|0 Nattorei: (86.93% - 102.56%) (about 50% chance to ohko w/ sr)
THUNDERBOLT
+2 Thunderbolt vs 252|252 Calm Burungel: (84.16% - 99.50%) (about 75% chance to ohko w/ sr)
+2 Thunderbolt vs any Gyarados: lol
+2 Thunderbolt vs 252|4 Suicune: (107.92% - 127.23%)
+ 1 Thunderbolt vs 252|4 Suicune: (81.19% - 95.54%) (about 50% chance to ohko w/ sr
+2 Thunderbolt vs 252|0 Weezing: (98.20% - 115.87%) (ohko w/ sr)
+2 Thunderbolt vs 252|0 Skarmory: (196.41% - 231.74%)
FLAMEFILLER
+2 Flamethrower vs 252|0 Skarmory: (196.41% - 231.74%)
+2 Flametrower vs 0|0 Doryuuzu: (191.69% - 226.04%) (you outspeed it in sand if it is not jolly)
+2 Flamethrower vs Gliscor: (87.85% - 103.39%) (ohko w/ sr)
+2 Flamethrower vs 0|0 Landlos: (92.48% - 109.09%) (ohko w/ sr)
+2 Flamethrower vs 252|0 Nattorei: (244.32% - 288.64%)
+2 Fire Blast vs 252|0 Weezing: (123.95% - 146.11%)
Also note how it outspeeds nearly every scarfer in existence including the 145 Speed pure Bug Agirudaa if it is not carrying a +Spe nature.
Priority vs Nidoking:
252 Adamant +1 Scizor Bullet Punch vs 0|0 Nidoking: (66.34% - 78.22%)
252 Adamant +1 Metagross Bullet Punch vs 0|0 Nidoking: (45.54% - 53.80%)
252 Adamant LO Dragonite ExtremeSpeed vs 0|0 Nidoking: (52.15% - 61.72%)
252 Adamant +1 LO Dragonite ExtremeSpeed vs 0|0 Nidoking: (78.22% - 92.08%) (it resists SR ;D)
252 Adamant +1 Lucario Extremespeed vs 0|0 Nidoking: (52.15% - 61.72%)
252 Adamant +1 Mamoswine Ice Shard vs 0|0 Nidoking: (89.11% - 104.95%)
252 Adamant +1 Weavile Ice Shard vs 0|0 Nidoking: (83.83% - 99.01%) <- fail
252 Adamant +1 Cloyster Ice Shard vs 0|0 Nidoking: (71.95% - 85.15%)
252 Adamant +1 Azumarill Aqua Jet vs 0|0 Nidoking: (97.69% - 115.51%)
252 Adamant +1 LO Roobushin Mach Punch vs 0|0 Nidoking: (30.36% - 35.64%)
oh, and there's Shadow Sneak etc, but those aren't as dangerous as the aforementioned ones, I think.
Unreleased:
252 Adamant +2 Breloom Tech Mach Punch vs 0|0 Nidoking: (57.43% - 67.66%)
Ditto CAN of course revenge it, but it loses out on the LO boost so it should be a lot less of a threat, especially considering how it would most likely use Earth Power or Fire Blast/Flamethrower to revenge it, which means that stuff like Gyara, the Lati@s, Balloon Tran etc would get a "free" switch-in..
Fun stuff.