Core: Escavalier / Kingdra

One drawback of the previous offensive core of Heracross / Medicham was that it lacked defensive synergy, although its offensive synergy is phenomenal. Escavalier and Kingdra, however, have typings that complement each other perfectly. With each opening up opportunities for the other to sweep, they function well as a powerful bulky offensive core.

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Kingdra @ Chesto Berry 

Trait: Swift Swim 

EVs: 180 HP / 160 Atk / 4 SDef / 164 Spd 

Adamant Nature (+Atk, -SAtk) 

- Dragon Dance 

- Waterfall 

- Outrage 

- Rest

Escavalier @ Choice Band 

Trait: Swarm 

EVs: 248 HP / 252 Atk / 8 SDef 

Adamant Nature (+Atk, -SAtk) 

- Megahorn 

- Iron Head 

- Return 

- Pursuit

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Kingdra is blessed with one of the best type combinations in the game, along with deceptively good bulk. ChestoRest is Kingdra's most dangerous set for sweeping, capable of setting up multiple boosts against weaker attackers. Opponents unaccustomed to dealing with this set will be in for a big surprise with Rest, which essentially gives Kingdra a second life by healing off all damage and status ailments. Water + Dragon provides outstanding type coverage, with the only notable resistant Pokémon being Empoleon. High HP and considerable Attack investment give Kingdra good bulk and power. 164 Speed EVs allow the set to outspeed Scarf Flygon after two Dragon Dance boosts. 

Escavalier backs up Kingdra with perfect synergy and an incredible base 135 Attack stat. Both its offensive and defensive stats are superior to those of Scizor, making it an excellent bulky hitter. Although Escavalier's type coverage is poor, its damage output allows it to heavily dent even resisted switch-ins. Escavlier's main job is to punch holes through opposing teams for Kingdra to eventually sweep through.

Kingdra's main counter in UU will be Empoleon. Fortunately, it lacks recovery and is vulnerable to hazards. Even better, Empoleon Steel typing means that opponents may often switch it into Escavalier's attacks. With max HP Empoleon taking 49.46% - 58.33% from Megahorn, it can be taken down pretty fast. 

This core also has perfect defensive synergy, with each member resisting the other's only weakness. Opponents trying to use Scarf Flygon to check Kingdra will be put in a tough spot, with Escavalier waiting to switch in on Outrage and OHKO back with Megahorn. UU has much fewer Dragon- and Steel-types than OU, meaning a core like this can put giant pressure on standard teams.

Set: Choice Band Escavalier

Escavalier @ Choice Band 

Trait: Swarm 

EVs: 248 HP / 252 Atk / 8 SDef 

Adamant Nature (+Atk, -SAtk) 

- Megahorn 

- Iron Head 

- Return 

- Pursuit

The power behind this set is staggering. Escavalier's gigantic base 135 Attack puts it on the level of OU's top physical threats, even beating its higher-tiered counterpart: Scizor. Although Escavalier suffers from an incredibly low base 20 Speed stat, its defensive stats are high enough for it to successfully pull of the role of an extremely hard-hitting bulky attacker.

Escavalier's excellent typing allows it to switch in often to spam high-powered attacks. Since Steel-types are much less common in UU, HP Fire tends to be a rare move. This means Escavalier receives free switch-ins on several Grass-types, including most Roserade and Celebi sets. 

Megahorn is the set's hardest hitting move. Even physically defensive behemoths like Donphan, Rhyperior and Slowbro are easily 2HKOed (with a clean OHKO in the case of the latter). Iron Head is a reliable secondary STAB for hitting Bug resists for extra damage. Return has a nice max base power of 102, which dishes out plenty of damage with this set. Pursuit is excellent for trapping Ghosts like Mismagius; thanks to Escavalier's bulk, the Nasty Plot set fails to 2HKO with HP Fighting at +2.

Escavalier's movepool is poor in terms of type coverage, but its power is enough to wear down nearly any opponent, even Pokémon that resist its attacks. Entry hazards are really helpful for making it easier to take down "counters." As far as teammates go, Scarf Heracross is an excellent partner to this set. It can form a double Bug offensive core with Escavalier, spamming Megahorn and later Close Combat after Ghost-types have been trapped with Pursuit.