Counter that Pokémon

Jellicent @ Leftovers
Ability: Water Absorb
EVs: 252 SDef / 252 HP / 4 SAtk
Calm Nature
- Recover
- Will-O-Wisp
- Taunt
- Scald

Immune to STABs, and threatens with a burn.

Celebi @ Choice Specs
Trait: Natural Cure
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Leaf Storm
- Earth Power
- Shadow Ball
- Psychic

With Leaf Storm, Jellicent could be easily defeated. Shadow Ball works, too. Also, it's got enough bulk to endure a few Scalds that Jellicent throws at it.

Hydreigon @ Choice Scarf
Ability: Levitate
EVs: 252 Spd / 252 SAtk / 4 Atk
Hasty Nature
- Draco Meteor
- Focus Blast/Dark Pulse
- Fire Blast
- U-turn

Can switch in to any of its moves, and threaten with STAB Dark Pulse or 4x effective U-turn.

Togekiss@Leftovers
252 SAtk / 252 Speed / 6 HP
Modest Nature
Trait: Serene Grace
- Nasty Plot
- Air Slash
- Dazzling Gleam
- Fire Blast

Hard walls and doesnt take anything from Fire Blast really, then returns the KO with DG.

Rhyperior @ Choice Band
Trait: Solid Rock
EVs: 252 HP / 140 Atk / 116 SpD
Adamant Nature

- Stone Edge
- Earthquake
- Megahorn
- ThunderPunch

Stone Edge easily OHKOes Togekiss, while Dazzling Gleam fails to 2HKO (albeit barely).

140+ Atk Choice Band Rhyperior Stone Edge vs. 0 HP / 0 Def Togekiss: 552-650 (177.4 - 209%) -- guaranteed OHKO
252+ SpA Togekiss Dazzling Gleam vs. 252 HP / 116 SpD Rhyperior: 183-216 (42.1 - 49.7%) -- guaranteed 3HKO

Suicune @ Leftovers
Trait: Pressure
EVs: 252 HP / 252 Def / 4 SDef
Bold Nature (+Def, -Atk)
- Calm Mind
- Scald
- Rest
- Sleep Talk

Due to Choice Band, Rhyperior would be stuck to Stone Edge, which Suicune is bulky enough to endure. After it's sent out on the field, it would immediately use Scald and take down Rhyperior. If it's ever in low HP, it should always be able to recover itself with Rest. With Sleep Talk, it could continue attacking while it's asleep. :]

Ludicolo @ Life Orb
Trait: Rain Dish
EVs: 4 HP / 252 SpA / 252 Spe
- Giga Drain
- Ice Beam
- Hydro Pump
- Protect

4 SpA Suicune Scald vs. 4 HP / 0 SpD Ludicolo: 19-23 (6.2 - 7.6%) -- possibly the worst move ever

252+ SpA Life Orb Ludicolo Giga Drain vs. 252 HP / 0 SpD Suicune: 242-289 (59.9 - 71.5%) -- guaranteed 2HKO after Leftovers recovery

Lickilicky @ Leftovers
Ability: Cloud Nine
EVs: 252 SDef / 252 HP / 4 Atk
Careful Nature
- Return
- Toxic
- Wish
- Protect

The premiere special wall in NU. The perfect pokemon to counter one of the best sweepers in NU.


4 Atk Lickilicky Return vs. 4 HP / 0 Def Ludicolo: 129-153 (42.7 - 50.6%) -- 1.2% chance to 2HKO

252+ SpA Life Orb Ludicolo Giga Drain vs. 252 HP / 252+ SpD Lickilicky: 101-121 (23.8 - 28.5%) -- possible 5HKO after Leftovers recovery

252+ SpA Life Orb Ludicolo Hydro Pump vs. 252 HP / 252+ SpD Lickilicky: 149-177 (35.1 - 41.7%) -- 81% chance to 3HKO after Leftovers recovery

Lickilicky can Wish itself to sustain that damage while Ludicolo is getting worn down thanks to Life Orb recoil. Lickilicky can either Toxic stall, or go on the offensive with Return. Either way, it's gg to Ludicolo.

Aegislash @ Leftovers
EVs: 252HP 252 Attack 4 Def
Adamant Nature

Swords Dance
Sacred Sword
Shadow Sneak
King's Shield

Sableye @ Leftovers
Prankster
252 SpD 252 HP 4 Def
+SpD, -Atk

Taunt
Will-O-Wisp
Foul Play
Recover

Burn it when it tries to go to shield forme, taunt the dance, recover the minimal Shadow Sneak damage, foul play taunted Aegislash.

-Mega Gardevoir w/Gardevoirite
Nature: Modest
Ability: Pixilate
EVs: 252 Sp.Attack, 252 Speed, 4 HP
Moves: Hyper Voice (which is techinically possible to get at this point), Shadow Ball, Focus Blast, Calm Mind

Doesn't care much about a burn or Foul Play, and a Pixilated Hyper Voice puts Sableye in its place.

Muk@Choice Band
252 HP / 252 Atk / 6 Sp.Def
Trait: Poison Touch
Adamant Nature
- Gunk Shot
- Ice Punch
- Fire Punch
- Explosion

walls and decimates it

Metagross @ Life Orb
4 HP / 252 Atk / 252 Spe
Ability: Clear Body
Adamant nature

• Zen Headbutt
• Meteor Mash
• Earthquake
• Rock Polish

Muk can't touch dis. Muk can 3HKO with Fire Punch against a guaranteed OHKO from Metagross's Zen Headbutt, even having time to get a speed boost in for after. gg.

Slowbro @ Assault Vest
Ability: Regenerator
Nature: Bold
248 HP / 244 Def / 16 SpA
~ Scald
~ Psyshock
~ Slack Off
~ Thunder Wave

Bulky enough to take various hits from Metagross, cripples it with Thunder Wave, and then finishes off with a few Scalds.

Ampharos @ leftovers
Ability: Static
Nature: Modest
4 HP/252 SpA/252 Def
Thunderbolt
Cotton Gaurd
Heal Bell
Thunder wave

Slowbro is a final form, eviolite has no effect. A thunderbolt can finish it off no problem due to its low special defense.
Aah you changed it to assault vest. Okay :P

Raichu @ Life Orb
Ability: Lightningrod
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature
- Encore
- Nasty Plot
- Thunderbolt
- Hidden Power [Ice]

Raichu absorbs all your moves that affect the other pokemon and since it's a special attacker, Cotton Guard won't help one bit. Either encore Ampharos when Raichu switches in on that thunderbolt, or go immediately for the Nasty Plot. Then use HP Ice until Ampharos goes bye-bye.

Mamoswine (F) @ Life Orb
Trait: Thick Fat
EVs: 252 Atk / 4 SpD / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Icicle Crash
- Ice Shard
- Earthquake
- Superpower

Mamoswine is unaffected by Thunderbolt and it takes less than 28% from +2 boosted LO HP Ice thanks to Thick Fat.

+2 252 SpA Life Orb Raichu Hidden Power Ice vs. 252 HP / 4 SpD Thick Fat Mamoswine: 100-118 (23.5 - 27.8%) -- 84.8% chance to 4HKO
252+ Atk Mamoswine Earthquake vs. 4 HP / 0 Def Raichu: 578-684 (220.6 - 261%) -- guaranteed OHKO

Scizor @ Choice Band
252 Atk / 128 Def / 128 Spd
Adamant nature
- Bullet Punch
- Superpower
- U-Turn
- Pursuit

Is able to take any attacks that Mamoswine strikes. After that, it could defeat Mamoswine with just one Bullet Punch. Superpower works, too.

252+ Atk Choice Band Technician Scizor Bullet Punch vs. 252 HP / 0 Def Mamoswine: 390-458 (91.9 - 108%) -- 50% chance to OHKO
252+ Atk Choice Band Scizor Superpower vs. 252 HP / 0 Def Mamoswine: 518-610 (122.1 - 143.8%) -- guaranteed OHKO

Gyarados (F) @ Leftovers
Trait: Intimidate
EVs: 4 HP / 252 Atk / 252 Spd
Adamant Nature (+Atk, -SAtk)
- Ice Fang
- Dragon Dance
- Waterfall
- Earthquake

Scizor's Atk stat gets reduced by -1 when Gyarados switches in due to Intimidate. Waterfall or Earthquake can 3HKO Scizor after that.

-1 252+ Atk Scizor Superpower vs. 4 HP / 0 Def Gyarados: 58-69 (17.4 - 20.7%) -- possible 7HKO after Leftovers recovery
-1 252+ Atk Technician Scizor Pursuit vs. 4 HP / 0 Def Gyarados: 59-70 (17.7 - 21%) -- possible 7HKO after Leftovers recovery
-1 252+ Atk Scizor U-turn vs. 4 HP / 0 Def Gyarados: 51-60 (15.3 - 18%) -- possible 8HKO after Leftovers recovery
-1 252+ Atk Technician Scizor Bullet Punch vs. 4 HP / 0 Def Gyarados: 44-52 (13.2 - 15.6%) -- possibly the worst move ever

252+ Atk Gyarados Waterfall vs. 0 HP / 128 Def Scizor: 124-147 (44.1 - 52.3%) -- 17.6% chance to 2HKO
252+ Atk Gyarados Earthquake vs. 0 HP / 128 Def Scizor: 103-122 (36.6 - 43.4%) -- guaranteed 3HKO

Ferrothorn @ Leftovers
Ability: Iron Barbs
EVs: 252 Def / 252 HP / 4 Atk
Relaxed Nature
IVs: 30 Atk / 30 SAtk / 0 Spd
- Leech Seed
- Protect
- Gyro Ball
- Power Whip

Ferrothorn can set up Leech Seed and take minimal damage from all of Gyrados' attacks. Leech Seed + Leftover + Protect means that Ferrothorn is getting a huge chunk of its health back. A few Power Whips should be more than enough for Gyarados.