Counter that Pokemon! (READ THE FREAKING FIRST POST)

[#DickBats]

Heracross @ Heracronite
Ability: Moxie
EVs: 252 HP / 252 Atk / 4 Def
Nature: Adamant
- Close Combat
- Pin Missile
- Rock Blast
- Earthquake

 

[Omicron]

Skarmory @ Leftovers
Ability: Sturdy
EVs: 252 HP / 252 Def / 4 SpD
Impish Nature
- Roost
- Whirlwind
- Brave Bird
- Spikes

0 Atk Skarmory Brave Bird vs. 252 HP / 4 Def Mega Heracross: 376-448 (103.2 - 123%) -- guaranteed OHKO

 

[Omicron]

Based Hippowdon wins.

Hippowdon @ Leftovers
Ability: Sand Force
EVs: 252 HP / 4 Def / 252 SpD
Careful Nature
- Stealth Rock
- Slack Off
- Earthquake
- Rock Slide

0 Atk Hippowdon Earthquake vs. 172 HP / 0 Def Magnezone: 424-504 (130.8 - 155.5%) -- guaranteed OHKO

 

[Boilurn]

Tangrowth Hard-counters Hippowdon

Tangrowth @ Leftovers
Ability: Regenerator
EVs: 252 HP / 252 Def / 4 SpD
Relaxed Nature
- Sleep Powder
- Knock Off
- Leaf Storm
- Giga Drain

The first two moves cripple it, while the last two hit for super-effective damage. Also, Grass resists Ground-type moves.

 

[PlatinumDude]

Mega Sceptile:

-Substitute
-Giga Drain
-Dragon Pulse
-Focus Blast
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Sceptilite
Ability: Overgrow

Knock Off doesn't concern Sceptile thanks to Mega Stone mechanics. As a Grass Pokemon, it's immune to Sleep Powder; also, it 4x resists Giga Drain and Leaf Storm. It can wear Tangrowth down with Dragon Pulse.

 

[LightBlast]

Mega Altaria
Ability: Pixilate
Nature: Modest

Hyper Voice
Fire Blast
HP Ground
Roost

252Hp/252SpAtk

I think there is no explanation needed.

 

[Omicron]

Nidoking @ Life Orb
Ability: Sheer Force
EV's: 4HP/252 SpAtk/252 Spe
Timid Nature
-Sludge Wave
-Earth Power
-Ice Beam
-Thunderbolt

252 SpA Life Orb Sheer Force Nidoking Sludge Wave vs. 252 HP / 0 SpD Altaria: 377-447 (106.4 - 126.2%) -- guaranteed OHKO

Faster and hits mega altaria really hard.

 

[Omicron]

Scizor @ Choice Band
Ability: Technician
EVs: 248 HP / 212 Atk / 48 Def
Adamant Nature
- Bullet Punch
- Superpower
- U-turn
- Knock Off

252+ Atk Choice Band Technician Scizor Bullet Punch vs. 4 HP / 0 Def Weavile: 458-542 (162.4 - 192.1%) -- guaranteed OHKO

GG no re. Bullet Punch OP.

 

[Nah]

-Torkoal w/Leftovers
Nature: Bold
Ability: White Smoke
EVs: 252 HP, 252 Defense, 4 Sp.Attack
Moves: Lava Plume, Yawn, Earth Power, Protect

boom

 

[Omicron]

Golduck @ Choice Scarf
Ability: Cloud Nine
EVs: 252 SpAtk / 252 Spe / 4 HP
Modest Nature
- Surf
- Ice Beam
- Psychic
- Signal Beam

252+ SpA Golduck Surf vs. 252 HP / 0 SpD Torkoal: 350-414 (101.7 - 120.3%) -- guaranteed OHKO

 

[faf]

Ferrothorn @ Leftovers
Trait: Iron Barbs
EVs: 252hp/88def/168spd
Relaxed Nature (+Def, -Spe)
-Leech Seed
-Protect
-Gyro Ball
-Power Whip

Since Kyurem is lacking a Fighting type move, Ferrothorn can safely switch into any move Kyurem does (this is the best Kyurem can do):
56 SpA Teravolt Kyurem-B Ice Beam vs. 252 HP / 168 SpD Ferrothorn: 91-108 (25.8 - 30.6%) -- 1.6% chance to 4HKO after Leftovers recovery

And 2HKO it with Gyro Ball:
0 Atk Ferrothorn Gyro Ball (150 BP) vs. 0 HP / 0 Def Kyurem-B: 306-362 (78.2 - 92.5%) -- guaranteed 2HKO

 

[Nah]

-Druddigon w/Choice Band
Nature: Adamant
Ability: Sheer Force
EVs: 252 Attack, 252 HP, 4 Defense
Moves: Outrage, Fire Punch, Earthquake, Sucker Punch

0 Atk Ferrothorn Gyro Ball (43 BP) vs. 252 HP / 4 Def Druddigon: 49-58 (13.6 - 16.2%) -- possible 7HKO

Then OHKOs with Fire Punch.

 

[faf]

I see your Banded user and raise you another Banded user:

Azumarill @ Choice Band
Trait: Huge Power
EVs: 252hp/252atk/4spd
Adamant nature (+Atk, -Sp. Atk)
-Play Rough
-Aqua Jet
-Waterfall
-Superpower

Best option Druddigon can use is Earthquake:
252+ Atk Choice Band Druddigon Earthquake vs. 252 HP / 0 Def Azumarill: 204-241 (50.4 - 59.6%) -- guaranteed 2HKO

Thanks to Azumarill outspeeding Druddy by 2 base points, it can OHKO with Play Rough:
252+ Atk Choice Band Huge Power Azumarill Play Rough vs. 252 HP / 4 Def Druddigon: 582-686 (162.5 - 191.6%) -- guaranteed OHKO

 

[halcyonic]

Slowbro @ Slowbronite
Ability: Oblivious
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
-Calm Mind
-Scald
-Psyshock
-Slack Off

lol wats a banded azumarill durrr

 

[shvihka]

Stallrein @ Leftovers
Abillity: Ice Body
EVs: 232 HP / 252 Def / 24 Spe
Bold Nature
- Protect
- Substitute
- Toxic
- Blizzard

Mega Slowbro can't really touch it and will eventually die to poison.

 

[Omicron]

Magmar @ Eviolite
Ability: Vital Spirit
EVs: 200 HP / 248 SpA / 60 Spe
Modest Nature
- Fire Blast
- Focus Blast
- Hidden Power Grass
- Substitute

248+ SpA Magmar Fire Blast vs. 172 HP / 0 SpD Magnezone: 356-422 (109.8 - 130.2%) -- guaranteed OHKO

 

[PlatinumDude]

Gabite @ Choice Band
Ability: Rough Skin

EV's: 252 Atk/ 252 Spe/ 4 Def
Nature: Jolly

- Earthquake
- Outrage
- Stone Edge
- Fire Fang

Resists everything pretty well, Outspeeds Magmar and makes OHKO with Earthquake.
Best bet for Magmar is Focus Blast, Makes 2HKO.

252 Atk Choice Band Gabite Earthquake vs. 200 HP / 0 Def Eviolite Magmar: 402-474 (125.2 - 147.6%) -- guaranteed OHKO

248+ SpA Magmar Focus Blast vs. 0 HP / 0 SpD Gabite: 192-227 (69.3 - 81.9%) -- guaranteed 2HKO

Gabite doesn't get Fire Fang; only Garchomp does.

Anyway:

Clefable:

-Calm Mind
-Moonblast
-Fire Blast
-Soft-Boiled
Nature: Bold
EVs: 252 HP/252 Def/4 SDef
Item: Leftovers
Ability: Magic Guard

Clefable avoids the 2HKO from Earthquake and KOs back with Moonblast.

 

[Nah]

^ Sorry about that.

Aggron @ Aggronite
Ability: Filter

EV's: 252 HP/ 240 Def.Sp/ 16 Def
Nature: Relaxed

- Stealth Rock
- Iron Head
- Ice Punch
- Earthquake

Clefable makes a possible 3HKO with Fire Blast. Aggron makes 2HKO with Iron head.

Problem with that is that Mega Aggron is slower than Clefable, so it dies before it can get off the 2nd Iron Head.
EDIT: Though, it is only a 47.7% chance to 3HKO, so I suppose it works as a counter, albeit a shaky one.

-Rotom-Wash w/Leftovers
Nature: Bold
Ability: Earthquake
EVs: 252 HP, 212 Defense, 44 Speed
Moves: Hydro Pump, Thunderbolt, Will-o-Wisp, Pain Spilt

Takes little (less than 10%) from Mega Aggron's attacks, then chips away at it with Hydro Pump/Thunderbolt/burn damage.

 

[shvihka]

Avalugg @ Leftovers
Ability: Sturdy

EV's: 248 HP / 8 Att / 252 Def
Nature: Impish

- Rapid Spin
- Avalanche
- Recover
- EQ

Outrage is a 4HKO, Avalugg OHKO's back with Avalanche.

 

[Omicron]

Clawitzer @ Life Orb
Ability: Mega Launcher
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Scald
- Dark Pulse
- Ice Beam
- Aura Sphere

252+ SpA Life Orb Mega Launcher Clawitzer Aura Sphere vs. 248 HP / 0 SpD Avalugg: 647-764 (164.6 - 194.4%) -- guaranteed OHKO

Avalugg 4 OHKO's at best and Clawitzer absolutely destroys it with Aura Sphere.