PS is down again, and so I might as well give analyses of all 6 Pokémon I'm using. Floating around 1650 right now.
Dodrio @ Choice Scarf
Ability: Early bird
EVs: 4 HP/252 Att/252 Spe
Nature: Adamant (+Att, -SpA)
-Brave Bird
-Double Edge
-Pursuit
-Thrash
The initial idea for this team was pretty much to remove physical walls and Rock/steel types and then sweep through a weakened team with Dodrio. And he's working about as well as I've imagined: his amazing speed and attack's swept through teams injured by Stealth Rocks and Spikes.
Of course, the thing's as fragile as anything else, (though IMHO Swellow's more so,) and if it ever takes a super-effective attack, it's dead. Priority in particular destroys Dodrio, though simply waiting for him to kill itself with recoil works too. Miltank, Alomamola are two walls that I've noticed that seem to be able to use that method to make me destroy myself.
Altogether, though, Dodrio's been an outstanding revenge-killer/sweeper, outspeeding and OHKOing any Cincinno set as well as many common scarfers in the tier. Either that, or he dies comically as I mispredict and send him into a SE attack.
Gabite @ Eviolite
Ability: Rough skin
EVs: 16 HP/252 Att/252 Spe
Nature: Jolly (+Spe, -SpA)
-Dual Chop
-Stone Edge
-Earthquake
-Hone claws
Originally theory-monned to be the Pokémon that would end up breaking steels and rock types: practice proved that this wasn't quite the case. While he cleanly KOed Probopass, Lairon, and Mawile, it was almost impossible to get more than one kill off him once he set up. There's just too many electric-types in the tier, which would seem like a good thing for a Dragon/ground until you realize they're all carrying HP Ice for pseudo Beam to go with their bolt.
Few things can actually WALL this Pokémon: Tangela's one of the few that I can think of that don't care a whit whether this guy's attacking. But as I said earlier, he's very vulnerable to being revenge-killed by any HP Ice/Ice beam bearing special attacker. Which usually then gets revenged by Dodrio, but whatever.
Chimecho @ Leftovers
Ability: Levitate
EVs: 252 HP/4 SpA/252 SpD
Nature: Calm (+SpD, -Att)
-Healing Wish
-Psychic
-Heal Bell
-Recover
Oh my goodness. When I decided that I was going to use Chimecho, even though I had used it in Nuzlockes before, I wasn't prepared for how beast this thing was. I had originally picked it for one thing only: Healing wish to give Dodrio a second chance to Brave Bird errything. And that's what I used her for the first couple of games, until I noticed the middling damage she was taking, even from powerful Special attackers.
She became the Special tank of the team, and even took several physical attacks for less than 1/2 her health. She's my solid answer to Amoongus and Weezing, and can (and has) dueled several special attackers into a standstill.
Of course, Psychic, Steel, and Dark types made Chimecho flee or use Healing Wish. But as that's what she was designed to do, that isn't such a bad thing.
Simipour @ Salac Berry
Ability: Gluttony
EVs: 252 SpA/4 SpD/252 Spe
Nature: Timid (+Spe, -Att)
-Hydro Pump
-Nasty Plot
-Ice beam
-HP Grass
I'm using a modified Salac Berry set, the difference being the lack of Substitute in favor of HP Grass. It's served me quite well as a wallbreaker, though the fact that she has to set up before sweeping can be problematic with her low bulk.
The strategy is generally to come in a non-threatening Pokémon like Alomamola and Nasty plot, then sweep for as long as I can until I am forced out or killed. If I play intelligently, Simipour can destroy a team's defensive core (+2 Ice beam does ~80% damage to Amoongus IIRC, and I usually have SR and at least one layer of spikes at this point.)
Unfortunately, Simipour's also weak to priority, more specifically, Sucker Punch. Absol can usually kill me unless he comes in while I'm still at 100%. And sweeps are easily ended by one missed Hydro pump.
Stunfisk @ Leftovers
Ability: Static
EVs: 252 HP/4 Def/252 SpA
Nature: Bold (+Def, -Att)
-Stealth Rock
-Discharge
-Earth Power
-Scald
My Stealth rock setter and second tank in general. I was honestly surprised by how bulky this guy was: taking less than 30% of my health from an Electabuzz's HP Ice with no SpD investment? Resisting a Braviary's Brave Bird attack and then having a 51% chance to have paralyzed it via Static and Discharge? Yes, please.
His damage isn't half bad either: many sweepers have been stopped by running into this wall and then dying to Discharge or Earth Power.
All I can really say is that this is usually one of the most reliable Pokémon on my team. Until it meets a grass-type. In which case, it runs for the hills. (Why aren't I running Sludge bomb again?)
Finally, number 6!
Glalie @ Normal Gem
Ability: Inner Focus
EVs: 252 HP, 4 SpD, 252 Spe
Nature: Jolly (+Spe, -SpA)
-Explosion
-Spikes
-Taunt
-Toxic
Generally my lead nowadays, despite being last on the roster. It's main job is to Taunt their leads so they can't set up while throwing up my own spikes before literally going out with a bang. And it does this pretty well: some games I can get all three, more games I get two, some games I don't even bother with Spikes and just explode over the fragile Pokémon that thinks they can stop me.
So... yeah. I don't really know why these 6 aren't more used: even me, a noob that literally started playing NU 3 days ago (after lurking for months) has managed to get within 100 of the first rank with these 6 never-used of the never-used.