Resource SV OU Good Cores

[Mr-Mongol]

Roaring Moon + Hisuian Zoroark (Offensive)
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These 2 edgy boys form an excellent offensive core since Moon will try and sweep en either get stopped in his track by Pokemon out-offensing him (aka Breloom Mach Punch) or by a wall that ignores his boosts and destroys his sweeping potential (aka Dondozo), but they are both troubled to find the Dragon was actually a furry packing a big Grass Knot.

Basically, anything that either walls or messes up Moon can be destroyed by Zoroark, while special walls found in OU (such as Clodsire, Ting-Lu or even Blissey) can be worn down or OHKO´d by Roaring Moon.

Certain versions of Roaring Moon may not want to engage against Corvnikhight due to the lack of Crunch (yes, some EQ + Acro moons exist) so Zoroark is also able to use Flamethrower to remove it, and the same goes for Roaring Moons without Acrobaticswho are waled by Great Tusk.

Roaring Moon @ Booster Energy
Ability: Protosynthesis
Tera Type: Flying
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Dragon Dance
- Crunch
- Earthquake/Taunt/Substitute
- Acrobatics
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Roaring Moon @ Choice Band
Ability: Protosynthesis
Tera Type: Dark
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Crunch
- Dragon Claw/Iron head
- Earthquake
- U-turn

Both sets will work extremely well since they usually get walled by the same things (and band can even run U-Turn to run over Ting-Lu).
My recommended set for Zoroark is specs since the opponent can just switch out if Zoroark misses out on the KO or they see Nasty Plot.


Zoroark-Hisui @ Choice Specs
Ability: Illusion
Tera Type: Normal
EVs: 252 SpA / 4 SpD / 252 Spe
IVs: 0 Atk
Timid Nature
- Shadow Ball
- Grass Knot
- Flamethrower
- Trick

I advice you to,if you want, use U-Turn with Zoroark, which can be as useful as Trick.
Grass Knot, Flamethrower and Shadow Ball (STAB) must stay.

 

[Mr-Mongol]

Baxcalibur + Slowking (Offensive)
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These 2 tall fat-tailed kings form a pretty surprisingly good core due to how Slowking allows Baxcalibur to do its thing easier than ever due to 3 main factors.

First of all, the set that benefits the most from Slowking´s assistant is banded, even tho other sweeping (or the weird situational scarf set) are also great as ever.

Baxcalibur @ Choice Band
Ability: Thermal Exchange
Tera Type: Dragon/Ice/Ground
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Glaive Rush
- Icicle Crash/Icicle Spear
- Earthquake
- Ice Shard

Slowking does 2 things that allow this (and other sets) to thrive: The ice-type defense boost from CHILLY RECEPTION and removes prediction from this choice-locked set thanks to FUTURE SIGHT.
Not only does Slowking offer free switch-ins for Baxcallibur (on top of that, giving it a Physical Defense boost which might help with the occasional Mach Punch Breloom), but it also removes prediction from the equation, allowing it to use its mighty stabs without too much worry about incoming defensive Pokemon (mainly Toxapex), as well as certain Pokemon who are able to OHKO Baxcallibur by outspeeding its decent 87 (300) speed, like Iron Valiant.

The Slowking set I recommend is the following, which uses Tera Fairy not to get destroyed by Bullet Seed Breloom (other teras can work, as well as Water):

Slowking @ Heavy-Duty Boots
Ability: Regenerator
Tera Type: Fairy
EVs: 248 HP / 8 Def / 252 SpD
IVs: 0 Atk / 0 Spe
Sassy Nature
- Future Sight
- Chilly Reception
- Surf
- Slack Off

Recommendations:
Great Tusk can be a good physically defensive Pokemon to form a defensive core, as well as Corviknight, who also grants slow U-Turns for Baxcallibur to switch into, as well as a Fairy/Dragon resist (both offer good/decent hazard removal, who Bax appreciates a lot).

Extra: Imo, think of nicknames related to royalty since one is a king and the other an Excalibur, so yeah, just that.