Project OU Break This Core! - Not hosted anymore

[HydreigonTheChild]

Clefable @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 196 Def / 60 Spe
Bold Nature
- Calm Mind
- Moonblast
- Soft-Boiled
- Thunder

CM clef sits on torn-t and slowbro and can use them to set up CM's. Tornadus-t does 42% and while knocking clef helps it it has to consistently hit hurricanes and has to get confusions in order to break through. Clefable completely sits on slowbro and its a free Calm mind for it. After one Calm mind boost clefable is basically unbreakable, and tornadus-t has to risk missing, paralysis, and sp. sttack drops

0 SpA Tornadus-Therian Hurricane vs. 252 HP / 0 SpD Clefable: 141-166 (35.7 - 42.1%) -- 90.4% chance to 3HKO after Leftovers recovery
0 SpA Tornadus-Therian Hurricane vs. +1 252 HP / 0 SpD Clefable: 94-112 (23.8 - 28.4%) -- possible 5HKO after Leftovers recovery
0 SpA Slowbro Future Sight vs. 252 HP / 0 SpD Clefable: 142-168 (36 - 42.6%) -- 94.6% chance to 3HKO after Leftovers recovery
0 SpA Slowbro Future Sight vs. +1 252 HP / 0 SpD Clefable: 94-112 (23.8 - 28.4%) -- possible 5HKO after Leftovers recovery

 

[godlywalrus]

this is break this core! welcome back

last round's analysis!

Threats of the Round

Fiery Moth gets in the way of this core thanks to its great bulk and quiver dance, threatening with a sweep after taking koko's or melmetal's attacks with little dificulties.

Mixed Ferrothorn doing Ferrothorn things, Durian is able to break this core with its great stats and ability to punish the opponents with hazards, leech seed and iron barbs. watch out for superpower and it'll be piece of cake!

Physdef Hippowdon comes all the way from the DLC 1 to check Melmetal and punish it with Rocky Helmet while also keeping Tapu Koko in check thanks to its Ground-typing and reliable recovery.

Additional Notes
The pair of magnets finds its way into many recent teams, this time also being able to check this dangerous core with its great typing and movepool. however, it needs good predictions vs Melmetal as Eearthquake and Superpower can dent it on the switch. magnetism for the win!

This powerful wallbreaker can stop Tapu Koko from spamming Thunderbolt, though it has problems to switch into Melmetal due to its frailty.

Finally, even though Quagsire can break this core with its typing and reliable recovery, Quagsire itself is a bit niche and is usually only available on stall teams where there are better options.

Round 12: Tornadus-T + Slowbro

This recent pair of lures forms a nice core in bulky offense and balance teams thanks to its amazing double Regenerator, being a pain to deal with for offensive teams that rely on Pokemon like Melmetal to punch holes. They can cover each other's weaknesses too, as Tornadus-T can take on Ghost-types like Dragapult and Blacephalon, and Slowbro manages threatening physical attackers like Melmetal and Weavile, while also providing its fellow wallbreakers opportunities to clean with its pivot moves. How would you break the double Regenerator core?

Sets!

Tornadus-Therian (M) @ Assault Vest
Ability: Regenerator
EVs: 252 HP / 88 SpD / 168 Spe
Timid Nature
- Heat Wave
- Hurricane
- Knock Off
- U-turn

Slowbro @ Colbur Berry
Ability: Regenerator
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Body Press
- Scald / Ice Beam / Future Sight
- Slack Off
- Teleport

You have 5 days to make submissions, happy posting! :]​

regieleki

 

[Zeno420]

Zeraora @ Leftovers
Ability: Volt Absorb
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Bulk Up
- Plasma Fists
- Knock Off
- Close Combat

After some minimal chip a +1 plasma will easily OHKO slowbro. But if this demon manages to come in on torn it basically claims since without a bit of physdef torn is easily OHKOed. Bulk up can be replaced with volt switch to better pivot on slowbro to not risk the burn.

252 Atk Zeraora Plasma Fists vs. 252 HP / 4 Def Tornadus-Therian: 354-416 (97.7 - 114.9%) -- 81.3% chance to OHKO
+1 252 Atk Zeraora Plasma Fists vs. 252 HP / 252+ Def Slowbro: 300-354 (76.1 - 89.8%) -- guaranteed 2HKO

​

 

[be_woke]

Reserving specs kyurem

Kyurem @ Choice Specs
Ability: Pressure
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
- Freeze-Dry
- Ice Beam
- Focus Blast
- Earth Power

​

Although this set has been seeing less use as of late it is still very potent especially against this core.

Kyurem basically only needs to use its Ice type coverage against this core. Since Slowbro gets cleanly OHKO'd by Freeze-Dry and Tornadus-T risks dying in one hit as well especially with rocks up. Torn cannot dodge the 2HKO from Freeze-Dry either by knocking the Specs so Freeze-Dry is overall a safe move to press if you don't mind taking the Knock.

Kyurem could potentially switch in on the attacks this core throws around since you don't really need HP to break this core. Still losing its Specs on a Knock makes you way less threatening and Body Press does a good amount of chip so it should just be pivoted in safely.

Calcs

252+ SpA Choice Specs Kyurem Freeze-Dry vs. 252 HP / 4 SpD Slowbro: 452-534 (114.7 - 135.5%) -- guaranteed OHKO

252+ SpA Choice Specs Kyurem Freeze-Dry vs. 252 HP / 88 SpD Assault Vest Tornadus-Therian: 252-296 (69.6 - 81.7%) -- 56.3% chance to OHKO after Stealth Rock

252+ SpA Kyurem Freeze-Dry vs. 252 HP / 88 SpD Assault Vest Tornadus-Therian: 168-198 (46.4 - 54.6%) -- 57% chance to 2HKO
(this is for when you freeze dry on the switch and then use it again on the knock)

252+ SpA Choice Specs Kyurem Ice Beam vs. 252 HP / 88 SpD Assault Vest Tornadus-Therian: 320-380 (88.3 - 104.9%) -- 31.3% chance to OHKO

 

[Birdbrain103]

Reserving Glastrier



Glastrier @ Leftovers
Ability: Chilling Neigh
EVs: 112 HP / 252 Atk / 144 Spe
Adamant Nature
- Icicle Crash
- High Horsepower
- Megahorn
- Swords Dance

If Glastrier can get in on Tornadus, it can force it into Slowbro by threatening an OHKO with Icicle Crash, set up a Swords Dance on the switch and then OHKO Slowbro with Megahorn. Even if Tornadus attacks on Swords Dance, it fails to do enough damage.

0 SpA Tornadus-Therian Heat Wave vs. 112 HP / 0 SpD Glastrier: 136-162 (36.8 - 43.9%) -- 99.5% chance to 3HKO after Leftovers recovery
252+ Atk Glastrier Icicle Crash vs. 252 HP / 0 Def Tornadus-Therian: 398-470 (109.9 - 129.8%) -- guaranteed OHKO
+2 252+ Atk Glastrier Megahorn vs. 252 HP / 252+ Def Slowbro: 418-494 (106 - 125.3%) -- guaranteed OHKO

 

[FearNeverDies]

Reserving Rotom-Wash



With and amazing Electric and water typing this Rotom form can put in trouble this combination without effor. Nasty Plot ensure offensive pressure against both of this guys, since none of them can hit it back or take any of the hits. Thanks to Pain Split+Nasty Plot defensive and offfensive utility are guarantee.

Calcs:
252 SpA Rotom-Wash Thunderbolt vs. 252 HP / 4 SpD Slowbro: 306-360 (77.6 - 91.3%) -- guaranteed 2HKO
252+ Def Slowbro Body Press vs. 0 HP / 0 Def Rotom-Wash: 81-96 (33.6 - 39.8%) -- 27.5% chance to 3HKO after Leftovers recovery

252 SpA Rotom-Wash Thunderbolt vs. 252 HP / 88 SpD Assault Vest Tornadus-Therian: 168-200 (46.4 - 55.2%) -- 67.6% chance to 2HKO

0- Atk Tornadus-Therian Knock Off (97.5 BP) vs. 0 HP / 0 Def Rotom-Wash: 60-71 (24.8 - 29.4%) -- 100% chance to 4HKO

Set:
Rotom-Wash @ Leftovers
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Hydro Pump
- Pain Split
- Thunderbolt/Nasty Plot

 

[agslash23]

Reserving any Electric Type

 

[Darkortex]

Regieleki @ Choice Specs
Ability: Transistor
EVs: 4 Atk / 252 SpA / 252 Spe
Rash Nature
- Volt Switch
- Thunderbolt
- Rapid Spin
- Explosion/swift/ancient power

Regieleki switches into this core's attacks and rips each member to shreds in one hit. Last move can be whatever. See calcs below if you want:

252+ SpA Choice Specs Transistor Regieleki Thunderbolt vs. 232 HP / 88 SpD Assault Vest Tornadus-Therian: 402-474 (112.6 - 132.7%) -- guaranteed OHKO
252+ SpA Choice Specs Transistor Regieleki Thunderbolt vs. 252 HP / 4 SpD Slowbro: 726-854 (184.2 - 216.7%) -- guaranteed OHKO
252+ Def Slowbro Body Press vs. 0 HP / 0 Def Regieleki: 147-174 (48.8 - 57.8%) -- 96.1% chance to 2HKO
0 SpA Slowbro Scald vs. 0 HP / 0- SpD Regieleki: 166-196 (55.1 - 65.1%) -- guaranteed 2HKO
4 SpA Tornadus-Therian Heat Wave vs. 0 HP / 0- SpD Regieleki: 144-170 (47.8 - 56.4%) -- 85.9% chance to 2HKO
4 SpA Tornadus-Therian Hurricane vs. 0 HP / 0- SpD Regieleki: 124-147 (41.1 - 48.8%) -- guaranteed 3HKO

Need I say more?

 

[SLDR]

Mixed Dragapult

Dragapult @ Dragon Fang
Ability: Infiltrator
EVs: 92 Atk / 164 SpA / 252 Spe
Hasty Nature
- Dragon Darts
- Hex
- Thunder Wave
- U-turn​

Av torn-t is a good check to Dragapult which means this set also acts as a lure, taking advantage of the fact that this core is very status weak and not supported by tapu fini due to overlap with slowbro. this pult easily 2hkos torn-t with dragon fang boosted dragon darts while still perfectly 2hkoing slowbro with hex, which means ohko if hex is boosted. If bro has future sight, you run virtually no risk in staying in and click twave. scald burn would be annoying and ice beam hurts, but on a team with hex pult is sensible to have complementary status users to hit a broader spectrum of targets anyway.
92 atk evs with dragon fang also allow dragon darts to 2hko blissey after a single u-turn of damage, which is very handy as blissey is one of the hardest counters to the hex spam strategy and just pult in general.

in the broader context of battle, pult has an easy time when it's positioned vs slowbro with little to no reason to click anything but thunder wave on the predicted switch-in. Catching tornadus-t with thunder wave is massive for those mid speed tier wallbreakers that pair well with pult, main ones being kart and shifu.

Draco meteor > twave and shadow ball > hex are viable options to retain effectiveness in handling urshifu and kartana.

 

[Verdas]

Set:
Blacephalon @ Choice Specs
Ability: Beast Boost
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Flamethrower
- Shadow Ball
- Overheat
- Trick

Overview:
Blacephalon is a strong breaker against this core, threatening both Tornadus and Slowbro with its STAB's. Slowbro easily folds to Shadow Ball, and Tornadus-T is always 2HKO'd by Overheat, and can potentially be OHKO'd from full if Stealth Rock is up. The main weakness it has in breaking this core is having to guess who is coming in on the switch. Even then, Overheat always does over 50% to Slowbro, and Flamethrower has a 33.2% chance to 2HKO Tornadus. Plus, most Blacephalon teams have heavy hazard support, meaning that the Slowbro/Tornadus player is getting their pokemon worn down into range of Blacephalon by Spikes/Stealth Rock, meaning they can lose their defensive backbone even if they guess right.

Relevant Damage Calcs:
252 SpA Choice Specs Blacephalon Overheat vs. 252 HP / 88 SpD Assault Vest Tornadus-Therian: 235-277 (64.9 - 76.5%) -- guaranteed 2HKO (12.5% chance to OHKO after Stealth Rock)
252 SpA Choice Specs Blacephalon Flamethrower vs. 252 HP / 88 SpD Assault Vest Tornadus-Therian: 163-193 (45 - 53.3%) -- 33.2% chance to 2HKO
252 SpA Choice Specs Blacephalon Shadow Ball vs. 252 HP / 4 SpD Slowbro: 524-620 (132.9 - 157.3%) -- guaranteed OHKO
252 SpA Choice Specs Blacephalon Overheat vs. 252 HP / 4 SpD Slowbro: 213-251 (54 - 63.7%) -- guaranteed 2HKO

 

[AquaVanilla]

reserving yamper


Yamper @ Choice Band
Ability: Rattled
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Wild Charge
- Flame Charge
- Crunch
- Double-Edge
Yamper destroys this core with ease, it clicks wild charge and ends everything
252+ Atk Choice Band Yamper Wild Charge vs. 252 HP / 252+ Def Slowbro: 170-204 (43.1 - 51.7%) -- 98.8% chance to 2HKO after Stealth Rock
252+ Atk Choice Band Yamper Wild Charge vs. 252 HP / 4 Def Tornadus-Therian: 306-360 (84.5 - 99.4%) -- guaranteed 2HKO
bark

 

[agslash23]

Tapu Lele @ Leftovers
Ability: Psychic Surge
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Calm Mind
- Psyshock
- Moonblast
- Thunderbolt/Focus Blast

Torn-Bro core thinks that it can handle Lele well by pivoting around to scout for its Choice-Locked Moves that each mon takes advantage of - Torn can take anything but Psyshock and proceed to Knock the choice item, while Bro takes Psyshocks that force out Torn really well and uses the opportunity to set up a Terrain-boosted Future Sight.

However, this pivoting tactic will fail if the Lele is not choiced-locked. Hence, CM Lele proceeds to deceive the core into believing that they scouted for a move successfully, only to get set up on and faint to Lele's moves.

Lele can switch into Slowbro easily as it doesn't take much damage from it (Torn too, but need to be a bit careful of Hurricanes and Knock), setups and breaks the core.

Calcs

AV Torn -

+1 252 SpA Tapu Lele Psyshock vs. 248 HP / 0 Def Tornadus-Therian in Psychic Terrain: 306-361 (84.7 - 100%) -- 6.3% chance to OHKO
0 SpA Tornadus-Therian Hurricane vs. +1 0 HP / 4 SpD Tapu Lele: 76-91 (27 - 32.3%) -- 63.5% chance to 4HKO after Leftovers recovery

Slowbro -

+1 252 SpA Tapu Lele Moonblast vs. 252 HP / 4 SpD Slowbro: 279-328 (70.8 - 83.2%) -- guaranteed 2HKO
+1 252 SpA Tapu Lele Thunderbolt vs. 252 HP / 4 SpD Slowbro: 352-416 (89.3 - 105.5%) -- 37.5% chance to OHKO

0 SpA Slowbro Scald vs. +1 0 HP / 4 SpD Tapu Lele: 51-61 (18.1 - 21.7%) -- possible 6HKO after Leftovers recovery
0 SpA Slowbro Future Sight vs. +1 0 HP / 4 SpD Tapu Lele in Psychic Terrain: 50-59 (17.7 - 20.9%) -- possible 7HKO after Leftovers recovery

 

[wind]

as co-host i'd like to ask people on this thread to stop making "meme posts"; first time its funny, you got us, second time you're kind of derailing thread's purpose and flooding it. otherwise keep the posts going, and have a good night! :)

 

[ausma]

(i’ll be deleting those going forward by the way)
gotchu bestie

 

[Mimikyu Stardust]

reserving NP torn-t

Tornadus-Therian (M) @ Heavy-Duty Boots
Ability: Regenerator
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Nasty Plot
- Hurricane
- Focus Blast
- Heat Wave/Knock Off​

Right off the bat this thing gets in vs those 2 without any worry, ice beam slowbro? does up to 50 only and gets 2hko, and AV torn usually never goes into another torn worrying about knock, and once torn-t gets a plot up (super easily btw) av torn cannot switch in savely, and EVEN if you are in with the AV torn vs the NP torn, u arent guarantee to 2hko with cane, so it just gets out of control. this thing gets in, gets a free plot up on so many mons fearing the knock, toxic or taunt, and its no difference here, and another thing that boosts this is that NP torn is a set that is from the days of old, where crown tundra was still young. nowadays noone expects it and usually will write it off as "oh it will do a little damage, so i should just pivot into my knock absorber or special tank, and cripple it with knock" which in this case is A. Slowbro and B. AV Torn-T, which warrants it a free +2.

An alternative to beating torn-t in one shot is having knock over heatwave



+2 252 SpA Tornadus-Therian Hurricane vs. 252 HP / 88 SpD Assault Vest Tornadus-Therian: 211-250 (58.2 - 69%) -- guaranteed 2HKO


+2 252 SpA Tornadus-Therian Hurricane vs. 252 HP / 4 SpD Slowbro: 382-451 (96.9 - 114.4%) -- 81.3% chance to OHKO

 

[H momento]

Weavile @ Choice Band
Ability: Pressure
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Triple Axel
- Beat Up
- Knock Off
- Ice Shard

A quick sum-up about our sharp-clawed friend, Weavile has gotten two buffs that were quite huge for it! Triple axel and Heavy-Duty Boots have allowed Weavile to function as such an excellent breaker forcing insane pressure on Offense and Bulky teams alike as the combination of its excellent stabs, seemingly infinite longevity thanks to Boots and its self-Knock Off support, and strong priority Ice shard it has proven itself to be quite the metagame threat, being ranked on A+ or S- on people's tierlists depending on who you ask!
Weavile is not a stranger to trying out new things: Life orb, Never-Melt Ice and Choice Band are all viable options! But Choice Band was never Weavile's style-- Not because it would look ugly on it or it's a bad item for it but because it has always preferred Swords dance sets thanks to its excellent offensive typing being able to force a lot of switches combined with it's alright special bulk and defensively potent Dark typing-- However! This is still a very fun set to use as it frees up the Swords dance moveslot allowing to experiment with moves like Poison jab, Low kick, Assurance and the bread and butter of this lure-- Beat up.

For those unfamiliar, Beat Up is quite the move!: This is a move that allows Weavile to hit its target 1-5 times depending on how many party healthy members (No status conditions!) are alive and kicking, The catch is that each hit will use a Pokémon's attack; This is the formula: (User's Base Attack ÷ 10) + 5
While calculating the move's power can be a chore since it depends on the team-- I've found that typically it'll probably have around 110 Base Power total on average on the teams where you'd use it.

Weavile's Beat Up damage will take place first, and it's always base 17 power, this allows Weavile to waste Slowbro's Colbur berry then retaliate with a full-on onslaught with an effectively 93 base power move (Almost identical to a boosted Knock Off!)
(Beat Up is not a contact move! I always thought it was-- This means that it's quite risk-free to click vs Rocky Helmet Corviknight, Slowbro and Ferrothorn etc.!)

Calculations

NOTICE: Please be mindful that it's impossible to properly calculate Beat Up damage as far as I know using the Calculator- Thus I've edited Ice shard to become a Dark type move with 17 base power replicating Weavile's first Beat up hit
And I've edited Throat Chop to be 93 base power representing the rest of party's average damage
For the sake of convenience I'll edit the calculation a little to properly display the move but do note this is how I calcualted it.

252+ Atk Choice Band Weavile Beat Up (17 BP) vs. 252 HP / 252+ Def Colbur Berry Slowbro: 30-36 (7.6 - 9.1%) -- possibly the worst move ever



252+ Atk Choice Band Weavile Beat Up (93 BP) vs. 252 HP / 252+ Def Slowbro: 320-378 (81.2 - 95.9%) -- 50% chance to OHKO after Stealth Rock

Minimum damage:
7.6% + 81.2% + 12% = 100.8% (Barely enough!)
Maximum damage:
9.1% + 95.9% + 12% = 117%

 

[Tysonslayer]

We are going to be closing this round tomorrow so avg and Mimikyu Stardust make sure you complete your posts by then if still interested.

 

[Plushietran]

Thundurus !

Thundurus-Therian (M) @ Heavy-Duty Boots
Ability: Volt Absorb
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Thunderbolt
- Focus Blast
- Grass Knot / Dark Pulse
- Nasty Plot
Tornadus's brother shows up again to smash through this core with super effective stab thunderbolts coming off its strong 145 special attack, and thats even without having to setup, which it can since its so naturally threatening against both slowbro and tornadus, which means it doesent have to fear ice beam from slowbro, so its a premier choice for breaking this core.​

 

[THKNKG]

@ Focus Sash
Level: 100
Timid Nature
Ability: Weak Armor
EVs: 252 SpA / 4 SpD / 252 Spe
- Shell Smash
- Shadow Ball
- Stored Power
- Any move/Psyshock

obviously blows back slowbro, but after a shell smash, it easily 2hkos AV torn.

+2 252 SpA Polteageist Stored Power (140 BP) vs. 252 HP / 88 SpD Assault Vest Tornadus-Therian: 206-243 (56.9 - 67.1%) -- guaranteed 2HKO

 

[wind]

Before getting into this round's analysis and next round's core, co-hosts (Tyson and me) would like to make two quick announcements! Those being:

1. We're looking for extra help when we both are busy with irl stuff. If you're interested dm us here on Smogon or Discord (Windingsss#8996 and Tysonslayer#8583)!

2. As a way to let community get involved with the project, we will be accepting cores from posters from this round and onwards! Just make a post telling us which core would you like to see in the project or just a core you like and leave sets. We'll take these into consideration for next rounds.

With that out of the way, lets start with this round!

last round's analysis!

Threats of the Round

As an Electric-type, Zeraora is able to break this core with its powerful Plasma Fists when boosted by Bulk Up. However, it might need to set up against Tornadus-T as Slowbro can burn it if it doesnt OHKO...

What a teapot! Polteageist joins this week's threats of the round because of its effective Shell Smash set that can blank Tornadus-T and break through Slowbro easily.

Calm Mind Tapu Lele is a dangerous sweeper that takes advantage of these types of cores that dont deal much damage to it. Moonblast the core away.

Additional Notes
We think Clefable has the tools to break this core; however, we found it to be hard to fit into a serious team.

Electric-types are still very strong and capable, and Koko is not an exception. However, it might need to watch out for Knock Off as loosing Heavy-Duty Boots may cripple its pivot role.

Kyurem has to think twice before clicking a move because Slowbro can take on pretty much all of its moves besides Freeze-Dry, but Tornadus-T can tank one of those and knock Specs off. Overall, solid Pokemon, just needs right predictions.

Round 12: Tapu Koko + Victini

This pivot core has shown what its capable of, as this core together can pressure common defensive cores and give each other opportunities to punch holes after removing their checks, with Victini sporting a powerful V-Create and Glaciate to nail Ground-types and Koko providing Speed control, a boost to Victini's Bolt Strike and longevity. How do you think you can stop the Pivot spam?!

Sets!

Tapu Koko @ Heavy-Duty Boots
Ability: Electric Surge
EVs: 8 HP / 216 SpA / 32 SpD / 252 Spe
Timid Nature
- Thunderbolt
- Dazzling Gleam
- Roost
- U-turn

Victini @ Heavy-Duty Boots
Ability: Victory Star
EVs: 252 Atk / 4 SpA / 252 Spe
Jolly Nature
- V-create
- Bolt Strike
- U-turn
- Glaciate

You have 5 days to post submissions, happy posting! :)​

 

[smokeyinferno]

reserving nihi

Nihilego @ Power Herb
Ability: Beast Boost
EVs: 80 Def / 176 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Meteor Beam
- Power Gem
- Sludge Wave
- Thunderbolt
​

Nihi doesn’t take terrain-boosted Bolt Strike well at all but it can outspeed and kill Victini with Meteor Beam (alternatively, Power Gem also kills after V-create drops)

Spoiler

252 Atk Victini Bolt Strike vs. 0 HP / 80 Def Nihilego in Electric Terrain: 241-284 (67.1 - 79.1%) -- guaranteed 2HKO
+1 176 SpA Nihilego Meteor Beam vs. 0 HP / 0 SpD Victini: 546-644 (160.1 - 188.8%) -- guaranteed OHKO
176 SpA Nihilego Power Gem vs. -1 0 HP / 0 SpD Victini: 366-432 (107.3 - 126.6%) -- guaranteed OHKO

Nihi tanks 2 Thunderbolts from Koko and kills with Sludge Wave or Meteor Beam, take your pick

Spoiler

252 SpA Tapu Koko Thunderbolt vs. 0 HP / 0 SpD Nihilego in Electric Terrain: 123-145 (34.2 - 40.3%) -- guaranteed 3HKO after Stealth Rock
+1 176 SpA Nihilego Meteor Beam vs. 8 HP / 32 SpD Tapu Koko: 333-393 (117.6 - 138.8%) -- guaranteed OHKO
176 SpA Nihilego Sludge Wave vs. 8 HP / 32 SpD Tapu Koko: 354-416 (125 - 146.9%) -- guaranteed OHKO

 

[agslash23]

Rotom-Heat @ Heavy-Duty Boots
Ability: Levitate
EVs: 248 HP / 8 SpA / 252 Spe
Timid Nature
- Nasty Plot
- Discharge
- Overheat
- Pain Split

Rotom-H resists all hits attempted by KokoTini core on it. Then, it sets up on them with Nasty Plot and breaks the core with a boosted Discharge or Overheat

 

[FangFoe]

Gastrodon @ Heavy-Duty Boots / Leftovers
Ability: Sticky Hold / Storm Drain
EVs: 252 HP / 4 Def / 252 SpD
Sassy Nature
- Scald
- Earthquake
- Recover
- Clear Smog / Toxic

Gastrodon stops this core with its godly typing and defensive stats. It can always come in on both of these pokemon and threaten them with a super-effective STAB Earthquake. Scald can cripple switchins that are put into the field by Tapu Koko and Victini's U-Turn. Clear Smog can help versus setup sweepers such as Volcarona, while Toxic can cripple them and other pokemon so they are put in on a timer. With recover, it doesn't care about chip damage done from their repeated attacks. Boots allows Gastrodon to not be chipped by hazards, but leftovers can be helpful to regen off the damages from U-Turns and other form of chip damage. Sticky Hold can be helpful whenever Koko and Victini's teammates try to knock its item off. Pretty straight forward.

:
252 SpA Tapu Koko Dazzling Gleam vs. 252 HP / 252+ SpD Gastrodon: 87-103 (20.4 - 24.1%) -- guaranteed 5HKO
0- Atk Tapu Koko U-turn vs. 252 HP / 4 Def Gastrodon: 70-83 (16.4 - 19.4%) -- possible 6HKO

0 Atk Gastrodon Earthquake vs. 0 HP / 0 Def Tapu Koko: 212-252 (75.4 - 89.6%) -- guaranteed 2HKO

:
252 Atk Victini V-create vs. 252 HP / 4 Def Gastrodon: 167-197 (39.2 - 46.2%) -- guaranteed 3HKO
252 Atk Victini U-turn vs. 252 HP / 4 Def Gastrodon: 87-103 (20.4 - 24.1%) -- guaranteed 5HKO
4- SpA Victini Glaciate vs. 252 HP / 252+ SpD Gastrodon: 35-42 (8.2 - 9.8%) -- possibly the worst move ever

0 Atk Gastrodon Earthquake vs. 0 HP / 0 Def Victini: 186-218 (54.5 - 63.9%) -- guaranteed 2HKO
0 SpA Gastrodon Scald vs. 0 HP / 0 SpD Victini: 162-192 (47.5 - 56.3%) -- 78.9% chance to 2HKO​

 

[cheru]

Tyranitar @ Choice Band
Ability: Sand Stream
EVs: 40 HP / 252 Atk / 48 SpD / 168 Spe
Adamant Nature
- Crunch
- Stone Edge
- Heavy Slam
- Fire Punch
(set stolen from Abhi's ttar post from the metagame discussion)​

Tyranitar is able to break through this core since even though Dazzling Gleam doesn't 2HKO Tyranitar due to the Special Defense boost form sand, and Victini can't do much to it damage due to its Fire resistance. Stone Edge is massively powerful as it can OHKO Tapu Koko. Crunch is good since against Victini so it doesn't rely on the on Stone Edge's inaccuracy.

calcs

252+ Atk Choice Band Tyranitar Stone Edge vs. 8 HP / 0 Def Tapu Koko: 315-372 (111.3 - 131.4%) -- guaranteed OHKO
216 SpA Tapu Koko Dazzling Gleam vs. 40 HP / 48 SpD Tyranitar in Sand: 132-156 (37.6 - 44.4%) -- guaranteed 3HKO
216 SpA Tapu Koko Thunderbolt vs. 40 HP / 48 SpD Tyranitar: 94-112 (26.7 - 31.9%) -- guaranteed 4HKO

252+ Atk Choice Band Tyranitar Crunch vs. 0 HP / 0 Def Victini: 440-518 (129 - 151.9%) -- guaranteed OHKO
252 Atk Victini U-turn vs. 40 HP / 0 Def Tyranitar: 118-140 (33.6 - 39.8%) -- guaranteed 3HKO
252 Atk Victini V-create vs. 40 HP / 0 Def Tyranitar: 113-133 (32.1 - 37.8%) -- 94.9% chance to 3HKO

4- SpA Victini Glaciate vs. 40 HP / 48 SpD Tyranitar in Sand: 28-33 (7.9 - 9.4%) -- possibly the worst move ever

 

[Katy]

reserving swampert


Swampert @ Leftovers
Ability: Damp
EVs: 252 HP / 4 Def / 252 SpD
Sassy Nature
IVs: 0 Spe
- Stealth Rock
- Flip Turn
- Earthquake
- Toxic​

Even tho Swampert dropped down in usage, it still serves as a good Pokemon against this core, as it can pressure both Tapu Koko and Victini with its STAB move in Earthquake and it can gain momentum via Flip Turn on them. Furthermore it can lay out Stealth Rock on both of these Pokemon without trouble. With Toxic it is able to pressure both Tapu Koko and Victini and it is also able to pressure their teammates. Swampert can also come in on them and tank hits and threaten them. Both, Tapu Koko and Victini also cannot make use of their Electric-type moves in Thunderbolt and Bolt Strike, as Swampert is immune to them due to it being part Ground-type. So Swampert makes up for a good Pokemon against this core.

calcs w. koko:
252 SpA Tapu Koko Dazzling Gleam vs. 252 HP / 252+ SpD Swampert: 82-97 (20.2 - 24%) -- possible 5HKO after Stealth Rock and Leftovers recovery
0- Atk Tapu Koko U-turn vs. 252 HP / 4 Def Swampert: 56-66 (13.8 - 16.3%) -- possible 9HKO after Stealth Rock and Leftovers recovery

0 Atk Swampert Earthquake vs. 0 HP / 0 Def Tapu Koko: 270-318 (96 - 113.1%) -- 75% chance to OHKO

calcs w. victini:
252 Atk Victini V-create vs. 252 HP / 4 Def Swampert: 133-157 (32.9 - 38.8%) -- 68.1% chance to 3HKO after Stealth Rock and Leftovers recovery
4- SpA Victini Glaciate vs. 252 HP / 252+ SpD Swampert: 34-40 (8.4 - 9.9%) -- possibly the worst move ever
252 Atk Victini U-turn vs. 252 HP / 4 Def Swampert: 70-83 (17.3 - 20.5%) -- possible 7HKO after Stealth Rock and Leftovers recovery

0 Atk Swampert Earthquake vs. 0 HP / 0 Def Victini: 236-278 (69.2 - 81.5%) -- guaranteed 2HKO
0 Atk Swampert Flip Turn vs. 0 HP / 0 Def Victini: 140-168 (41 - 49.2%) -- guaranteed 3HKO