Nidoqueen (F) @ Life Orb
Trait: Sheer Force
EVs: 252 Spd / 4 HP / 252 SAtk
Modest Nature
- Earth Power
- Thunderbolt
- Stealth Rock
- Flamethrower
I think everyone know what Nidoqueen does: smash faces. Flamethrower still 1HKO's Escavalier while not making someone bang their face into the keyboard with a miss, although if Fire Blast would really be better I'll change it. With all the switches she forces Nidoqueen has plenty of opportunity to set up Stealth Rocks, and Stealth Rocks are the most important hazard in RU right now, dealing some much needed residual damage to the other team while they switch and keeping dangerous threats like Moltres out of consideration without a spinner. Thunder Bolt hits Slowking hard, with the current spread on Slowking it'll do 62.69 - 73.85%, meaning that with LO damage it'll be quickly worn down to the point to where it's vulnerable to being ko'd. Earthpower is a solid STAB that gives it good coverage in the tier.
Some other points, with this pick it put's huge pressure on the other's teams picks as they either have to focus on using TR setters that can live through the Queens assaults or shift up to using faster sweepers that can check or revenge Nidoqueen, or use an Uxie. Keep in mind though with an Uxie this is stacking a dark/bug weakness, something that Absol and Accelgor would love to happen.
TL;DR: Nidoqueen is a beast, sets rocks, puts on heavy offensive pressure. If the other team uses an Uxie (one of the only "counters" to Nidoqueen) it stacks a dark and bug weakness that means Absol beats 1/2 the other team handily and that Accelgor can do a lot of work too late game.