Heracross

Heracross, The Singlehorn Pokémon. Heracross loves sweet sap and will go looking through forests for it. The Pokémon uses its two antennae to pick up scents as it searches. This Pokémon takes pride in its strength, which allows it to lift things 100 times heavier than itself with no trouble at all.

Overview

Heracross has been a well known Pokemon since its appearance in the anime and subsequent battles on Ash's team. Heracross has left a mark on the competitive scene since its release in GSC where it was the only Pokemon to have access to Megahorn. In ADV Heracross was rare but one of the most feared physical wallbreakers with STAB on its Focus Punches allowing it to cleanly 2HKO Skarmory, or OHKO with a Choice Band, making it difficult to handle. However, with the release of other better Fighting types such as Terrakion and Keldeo as well as new walls such as Toxapex, and the overall speed and power increases, the game has made it hard for Heracross to make a mark in a match.
Positives
Heracross has solid neutral coverage with its Fighting STAB and Stone Edge, complemented further with Megahorn.
Good abilities makes Heracross flexible in terms of sets, allowing for it to take a wallbreaking route against bulkier teams or a revenge killer with a Choice Scarf.
With access to Spikes now, Heracross can play the role of offensive Spikes user which adds another layer to its versatility.

Negatives
Heracross has fairly average base Speed at 85, which is just short of the common base 90-100 range. This makes it annoying for Heracross to keep up against more offensive teams especially with its numerous annoying weaknesses.
80/75/95 isn't as good of defensive stats as they used to be, making it difficult for Heracross t

Abilities

Swarm - Raises the power of Bug moves by 50% when below 33% health - This is an alright ability, but inferior to both of its other abilities due to its lack of consistency.
Moxie - Raises Attack by 1 stage after KOing a Pokemon - Solid ability as it makes Heracross a fearsome revenge killer, giving it snowballing potential to sweep late-game as well.
Guts - Raises Attack when afflicted by a status condition - Another great ability that got even better with burn damage being nerfed, and this can otherwise be used to abuse more stall based teams as a way to absorb Toxic.

Movesets

Guts Wallbreaker

-Swords Dance / Spikes
-Close Combat
-Facade
-Knock Off
Item Attached: Flame Orb
Ability: Guts
EVs and Nature:
252 Atk / 4 SpDef /252 Speed
Jolly Nature

With Swords Dance and Guts, Heracross can become a powerful wallbreaker with little effort. Close Combat is the primary move of the set being 120 base power STAB, making it an incredible wallbreaking tool. Knock Off is a nice coverage option for Psychic and Ghost switch-ins that would resist Close Combat, and it has the utility of crippling walls by removing their Leftovers or Heavy-Duty Boots. Facade rounds out the set as a 140 base power move with Guts active that can be spammed quite easily due to its high power and solid neutral coverage. Spikes is another option over Swords Dance as with the boost to Guts, Heracross is very strong as is, and the Spikes can potentially help wear down a team long-term more than Swords Dance could.

As a wallbreaker, Heracross wants as much power and Speed as possible. Guts boosts will give Heracross plenty of power as is, so Jolly nature is slightly preferable to give Heracross a bit more Speed. Flame Orb is the ideal item here so that Heracross can activate Guts by itself, as long as the foe doesn't hit Heracross with a different status like sleep on the first turn. Flame Body is a better choice than Toxic Orb here since the burn damage nerf makes the damage very minor compared to the Toxic damage that would stack up very quickly.

Choice Scarf

-Megahorn
-Close Combat
-Knock Off
-Spikes / Stone Edge / Earthquake
Item Attached: Choice Scarf
Ability: Moxie
EVs and Nature:
252 Atk / 4 SpDef /252 Speed
Jolly Nature

With a Choice Scarf, Heracross is an excellent option as a revenge killer or late game cleaner with Moxie to raise its offenses with each KO. Megahorn and Close Combat are excellent STAB options, both having 120 base power with Megahorn not having a drawback like Close Combat's defensive drops, at the cost of lower accuracy and being resisted by more types. Knock Off returns for all the same reasons as the Guts set, as well as just being one of the better moves in the games. However, Knock Off is not legal for Heracross in Battle Stadium so you would need to substitute it with a different coverage move if using Heracross there. The last slot is open for Stone Edge or Earthquake offensively which gives Heracross neutral coverage, but Spikes is another great option for mid game where Heracross is used to force switches. Note that Spikes is a very awkward move to lock into though, so be mindful that Heracross will often be forced out afterwards.

Maximum offensive investment gives Heracross as much offensive presence as possible, which is vital for a Choice Scarf set. Jolly nature takes advantage of this Speed further, though an Adamant nature could be considered if you wanted extra power. That said, Moxie's Attack boosts are generally enough for Heracross to sweep when it needs to do so.

Partners

Terrakion can pivot into threats that come into Heracross, and can threaten them out with its powerful Rock-type STABs
Cobalion is in a similar boat to Terrakion, but is more of a pivot with Volt Switch and can otherwise help get Heracross in on threats such as Krookodile.
Incineroar can check threats such as Doublade, and pivot out with Parting Shot to get Heracross in with ease.
Flygon can help break walls with its mixed attacker set, or clean up late game with Dragon Dance.
Bisharp can help maintain pressure with Defiant in combination with Heracross's ability to lay Spikes in order to potentially deter Defog usage.

Countering Heracross

Doublade is a nice option with its high defensive stats and resistance/immunity to Megahorn and Close Combat respectively. Doublade pretty much only has to fear Knock Off, but even Knock Off isn't going to help Heracross actually take down Doublade due to its insanely high defense.
Noivern is a nice aggressive option as it resists both of Heracross's STABs and threatens with Hurricane or Fire Blast. Just be careful switching into Guts-boosted Facade or Stone Edge, as Noivern isn't the most durable Pokemon around.
Scyther is quad resistant to Close Combat and resists, Megahorn while threatening a OHKO in return. Definitely needs to watch out for Stone Edge, though it's a very safe answer otherwise.
Talonflame has gained ground again with the release of Heavy-Duty Boots preserving health for Gale Wings and threatening an OHKO with Brave Bird.

Locations in Games

Red/Blue/Yellow:
Not in game

Gold/Silver/Crystal:
Not in game

Ruby/Sapphire/Emerald:
Safari Zone

FireRed/LeafGreen:
Pattern Bush

Colosseum/XD:
Snagged from Cipher Peon Dioge in Realgam Tower's Dome (Colosseum)

Diamond/Pearl/Platinum:
Honey Trees

HeartGold/SoulSilver:
Routes 7, 11, 16, 28, 33, 42, 44, 45, 46 & 47, Azalea Town Vermillion City, Celadon City, Mt. Silver

Black/White:
Route 12

Black 2/White 2:
Route 12, Lostlorn Forest (Black 2)
Hidden Grotto - Lostlorn Forest (White 2)

X/Y:
Route 12 (Y)
Friend Safari (X/Y)

Omega Ruby/Alpha Sapphire:
Safari Zone

Sun/Moon:
Trade from Ultra Sun/Ultra Moon

Ultra Sun/Ultra Moon:
Poni Grove

Let's Go, Pikachu!/Let's Go, Eevee!:
Not in game

Sword/Shield:
Forest of Focus, Challenge Road, Training Lowlands (Shield)
Max Raid Battles: Fields of Honor, Forest of Focus, Training Lowlands, Workout Sea (Shield)
Trade from Shield (Sword)

Anime Appearences

Heracross has made a few appearances in the anime. Ash used one during his Johto and Sinnoh campaigns and Goh traded for one and used it in his travels

# -English Episode Name- -Jap. Episode Name- Pics
121 A Sappy Ending Collide! Heracross vs. Pinsir! Pics
122 Roll On, Pokémon Donphan's Valley! Pics
124 Flower Power Bellossom's Battle Dancing Pics
125 Spinarak Attack Spinarak! The Ultimate Detective Job! Pics
126 Snubbull Snobbery Snubbull's Magnificent Life!? Pics
WV2 Pikachu's Winter Vacation: Winter Games Let's Play on the Ice! Pics
Pikachu's Winter Vacation: Stantler's Little Helpers Christmas Night Pics
130 The Whistle Stop Ledyba's Flute! Pics
132 A Bout With Sprout Pokemon School and Bellsprout's Tower! Pics
133 Fighting Flyer with Fire! Violet Gym! Sky Battle! Pics
138 Chikorita's Big Upset Chikorita's Jealousy! Pics
139 Foul Weather Friends Hoppip's Jealousy! Battle In the Big Prarie! Pics
142 Wired For Battle Battle! Heracross vs. Scizor!! Pics
144 A Shadow of a Drought Azalea Town! Slowpoke's Well! Pics
145 Goin' Apricorn Pineco and the Apricorns! Mountain-side Battle! Pics
147 A Farfetch'd Tale Ilex Forest! Search for Farfetch'd! Pics
148 Tricks Of The Trade Wobbuffet and the Pokémon Exchange! Pics
149 The Fire-ring Squad Burn Squirtle Squad! Like a Fire!! Pics
162 Air Time Radio Tower Battle! Center Crossover!  
171 Beauty and the Breeder Sayonara Vulpix! Beauty Contest! Pics
196 The Ring Masters Feraligatr Vs. Blastoise! Sumo Match! Pics
204 The Big Balloon Blow-Up Pokémon Balloon Race! Pass Through The Storm! Pics
M4 Celebi: Voice of the Forest Celebi: A Timeless Encounter Pics
227 Bulbasaur...The Ambassador! Goodbye Bulbasaur! Adventure at Oak's Residence!! Pics
271 The Ties That Bind Tournament Finals! Full Battle 6 vs 6!! Pics
272 Can't Beat the Heat! Rival Confrontation! Charizard VS Blatoise! Pics
C8 Showdown at the Oak Corral! Epic Battle at Oak's Lab! Pics
290 All In A Day's Wurmple! Double Battle & Double Wurmple!?! Pics
C14 Journey To The Starting Line! Pallet Town! The Setting off of the Pokémon Trainer! Pics
384 Absol-ute Disaster!! Absol! Creeping Shadow Of Disaster!! Pics
399 Deceit And Assist! Fierce Fighting! Grand Festival! (2)! Pics
410 The Right Place at the Right Mime Oak's Laboratory! All Member's Gather! Pics
441 Ka Boom With A View Fierce Fighting! Jungle Battle at the Battle Palace! Pics
443 Curbing the Crimson Tide! The Red Inazuma SkyScraper! Pics
520 Smells Like Team Spirit Tag Battle! The Finals! Pics
M11 Giratina & The Sky Warrior Giratina & The Bouquet of the Sky - Shaymin Pics
578 Steeling Peace of Mind! Riley & Lucario! Pics
579 Saving the World from Ruins The Hidden Ruins of Iron Island! Pics
M12 Arceus & The Jewel of Life Arceus - Towards Conquering Space-Time Pics
606 Strategy Begins At Home Dawn VS Mom! Showdown Between Parent & Child!! Pics
608 Historical Mystery Tour Natu, Xatu...Mysterious Forest! Pics
628 A Marathon Rivalry! Get Fired Up Snorlax! Prince of Pokéthlon! Pics
650 An Old Family Blend! The Eve of the Fierce Fighting! The Big Gathering of Ash's Pokémon! Pics
651 League Unleashed! Opening! Sinnoh League - Suzuran Tournament!! Pics
657 The Semi-Final Frontier Sinnoh League Semi-Final! Darkrai Appears! Pics
803 Dream Continues! My Dream: Pokémon Master! Pics
S35 Pokémon Mega Evolution Special I Strongest Mega Evolution ~Act 1~ Pics
838 The Forest Champion The Forest Champion! Enter Hawlucha!! Pics
S41 Pokémon Mega Evolution IV Strongest Mega Evolution ~Act IV~ Pics
M19 Volcanion and the Mechanical Marvel Volcanion & The Ingenious Magearna Pics
M22   Pokémon: Everyone's Story  
1064 A Recipe for Success! Mallow's Valiant Effort! The Forest Pokémon Café!! Pics
1068 A Timeless Encounter! Ash: A Timeless Encounter! Pics
1122 TBC Who Wants to Trade Pokémon? Pics
1124 TBC I Got Pikachu Pics