Ok, I don’t have much competitive experience, but I can do a crapload of research. So, yeah. I am going to be looking at the top ten most commonly used doubles Pokemon. This is via pikalytics btw.
Incineroar.
Based off of the smogon doubles moveset, this poke seems to do well as an intimidate pivot. Common Pokemon that have a good type advantage against it are, tapu fini, urshifu, landorus therian and rapid strike urshifu. Out of these, tapu fini is mostly used as a wall.
Let's Look at the sets.
Urshifu @ Focus Sash
Ability: Unseen Fist
EVs: 252 Atk/4 Def/252 Spe
Jolly Nature
-Wicked Blow
-Close Combat
-Sucker Punch
-Protect
-1 252 Atk Urshifu Close Combat vs. 244 HP / 84 Def Incineroar: 134-162 (66.6 - 80.5%) -- guaranteed 2HKO
Urshifu is a good all around sweeper, and is a powerful Pokemon. It has the added benefit of avoiding protect.
Landorus Therian @ Assault Vest
Ability: Intimidate
EVs: 4 HP/252 Atk/252 Spe
Jolly Nature
-Earthquake
-Swords Dance
-Rock Slide
-U-turn
-1 252+ Atk Landorus-Therian Earthquake vs. 236 HP / 4 Def Incineroar: 110-132 (55 - 66%) -- guaranteed 2HKO. Counting the Intimidate
With a swords dance,
+1 252+ Atk Landorus-Therian Earthquake vs. 236 HP / 4 Def Incineroar: 246-290 (123 - 145%) -- guaranteed OHKO. This is including the Intimidate.
Urshifu-Rapid-Strike @ Choice Band
Ability: Unseen Fist
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Surging Strikes
- Close Combat
- Aqua Jet
- U-turn
-1 252 Atk Urshifu-Rapid-Strike Surging Strikes (3 hits) vs. 236 HP / 4 Def Incineroar on a critical hit: 222-270 (111 - 135%) -- guaranteed OHKO
The good thing is you don’t have to use close combat, thus letting you keep in rapid strike urshifu.
Ok, so the next poke is Tapu Fini.
Tapu Fini is usually a wall. Let's see some common counters. Rilaboom, Regieleki and Zapdos.
Zapdos @ Life Orb
Ability: Static
EVs: 4 HP / 4 Def / 248 SpA / 252 Spe
Timid Nature
- Thunderbolt
- Heat Wave
- Hurricane
- Protect
248+ SpA Zapdos Thunderbolt vs. 252 HP / 76+ SpD Tapu Fini: 114-134 (64.4 - 75.7%) -- guaranteed 2HKO
Rillaboom @ Sitrus Berry
Ability: Grassy Surge
EVs: 252 HP / 56 Atk / 60 SpD / 140 Spe
Adamant Nature
- Fake Out
- Grassy Glide
- Knock Off
- U-turn
252+ Atk Choice Band Rillaboom Grassy Glide vs. 252 HP / 60 Def Tapu Fini: 162-192 (91.5 - 108.4%) -- 43.8% chance to OHKO
Regieleki @ Choice Specs
Ability: Transistor
EVs: 4 HP / 252 SpAtk / 252 Spe
Timid Nature
-Light Screen
-Reflect
-Electroweb
-Volt Switch
252 SpA Choice Specs Transistor Regieleki Thunderbolt vs. 252 HP / 76+ SpD Tapu Fini: 198-234 (111.8 - 132.2%) -- guaranteed OHKO
Next, Glastrier. It seems to be a sweeper.
Urshifu @ Focus Sash
Ability: Unseen Fist
EVs: 252 Atk/4 Def/252 Spe
Jolly Nature
-Wicked Blow
-Close Combat
-Sucker Punch
-Protect
252 Atk Urshifu Close Combat vs. 252 HP / 0 Def Glastrier: 168-198 (81.1 - 95.6%) -- guaranteed 2HKO
Urshifu-Rapid-Strike @ Choice Band
Ability: Unseen Fist
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Surging Strikes
- Close Combat
- Aqua Jet
- U-turn
252 Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Glastrier: 168-198 (81.1 - 95.6%) -- guaranteed 2HKO
Heatran @ Shuca Berry
Ability: Flash Fire
EVs: 228 HP / 252 SpAtk / 28 Spe
Modest Nature
-Earth Power
-Flash Cannon
-Heatwave
-Protect
252+ SpA Heatran Heat Wave vs. 252 HP / 4 SpD Glastrier: 122-146 (58.9 - 70.5%) -- guaranteed 2HKO
Next, is rilaboom. Rilaboom works as a grassy terrain sweeper.
Glastrier @ Assault vest
Ability: Chilling Neigh
EVs: 252 HP / 252 Atk / 4 SpD
Brave Nature
-High Horsepower
-Close Combat
-Icicle Crash
-Heavy Slam
252+ Atk Glastrier Icicle Crash vs. 252 HP / 0 Def Rillaboom: 188-224 (90.8 - 108.2%) -- 43.8% chance to OHKO
Zapdos @ Life Orb
Ability: Static
EVs: 4 HP / 4 Def / 248 SpA / 252 Spe
Timid Nature
- Thunderbolt
- Heat Wave
- Hurricane
- Protect
252 SpA Zapdos Hurricane vs. 252 HP / 4 SpD Rillaboom: 242-288 (116.9 - 139.1%) -- guaranteed OHKO
Heatran @ Shuca Berry
Ability: Flash Fire
EVs: 228 HP / 252 SpAtk / 28 Spe
Modest Nature
-Earth Power
-Flash Cannon
-Heatwave
-Protect
Next, is Regieleki. It is used with electroweb as speed control, and it also carries screens, however it can do some serious damage with Transistor + 252 SpAtk + Timid nature.
Landorus Therian @ Assault Vest
Ability: Intimidate
EVs: 4 HP/252 Atk/252 Spe
Jolly Nature
-Earthquake
-Swords Dance
-Rock Slide
-U-turn
252+ Atk Landorus-Therian Earthquake vs. 0 HP / 0 Def Regieleki: 260-308 (167.7 - 198.7%) -- guaranteed OHKO
Garchomp @ Life Orb
Ability: Rough Skin
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
-Rock Slide
-Earthquake
-Swords Dance
-Protect
252 Atk Garchomp Earthquake vs. 0 HP / 0 Def Regieleki: 218-260 (140.6 - 167.7%) -- guaranteed OHKO
Mamoswine @ Focus Sash
Ability: Oblivious
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
-Icicle Crash
-Ice Shard
-Protect
-High Horsepower
252 Atk Mamoswine Earthquake vs. 0 HP / 0 Def Regieleki: 218-260 (140.6 - 167.7%) -- guaranteed OHKO
Next, is Urshifu. It’s a sweeper.
Urshifu-Rapid-Strike @ Choice Band
Ability: Unseen Fist
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Surging Strikes
- Close Combat
- Aqua Jet
- U-turn
252 Atk Urshifu-Rapid-Strike Close Combat vs. 0 HP / 0 Def Urshifu: 206-246 (117.7 - 140.5%) -- guaranteed OHKO
Zapdos @ Life Orb
Ability: Static
EVs: 4 HP / 4 Def / 248 SpA / 252 Spe
Timid Nature
- Thunderbolt
- Heat Wave
- Hurricane
- Protect
252 SpA Life Orb Zapdos Hurricane vs. 0 HP / 4 SpD Urshifu: 351-416 (200.5 - 237.7%) -- guaranteed OHKO
Next is Porygon 2. It’s a TR setter and sweeper.
Urshifu @ Focus Sash
Ability: Unseen Fist
EVs: 252 Atk/4 Def/252 Spe
Jolly Nature
-Wicked Blow
-Close Combat
-Sucker Punch
-Protect
252 Atk Urshifu Close Combat vs. 244 HP / 92 Def Eviolite Porygon2: 134-162 (70.1 - 84.8%) -- guaranteed 2HKO
Urshifu-Rapid-Strike @ Choice Band
Ability: Unseen Fist
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Surging Strikes
- Close Combat
- Aqua Jet
- U-turn
252 Atk Urshifu-Rapid-Strike Close Combat vs. 244 HP / 92 Def Eviolite Porygon2: 134-162 (70.1 - 84.8%) -- guaranteed 2HKO
Zapdos (Galar) @ safety goggles
Ability: Defiant
EVs: 252 Atk / 4 SpD / 252 Spe
-Brave Bird
-Close Combat
-Stomping Tantrum
-Taunt
252 Atk Zapdos-Galar Thunderous Kick vs. 244 HP / 92 Def Eviolite Porygon2: 102-120 (53.4 - 62.8%) -- guaranteed 2HKO
Next, is Landorus Therian. Definitely a sweeper.
Glastrier @ Assault vest
Ability: Chilling Neigh
EVs: 252 HP / 252 Atk / 4 SpD
Brave Nature
-High Horsepower
-Close Combat
-Icicle Crash
-Heavy Slam
-1 252+ Atk Glastrier Icicle Crash vs. 4 HP / 0 Def Landorus-Therian: 252-300 (152.7 - 181.8%) -- guaranteed OHKO
Rotom Wash @ Sitrus berry
Ability: Levitate
EVs: 204 HP / 92 SpAtk / 112 Def / 20 SpDef / 80 Spe
Modest Nature
-Hydro Pump
-Nasty Plot
-Thunderbolt
-Protect
92 SpA Rotom-Wash Hydro Pump vs. 4 HP / 0 SpD Landorus-Therian: 170-204 (103 - 123.6%) -- guaranteed OHKO
Dracovish @ Choice Band
Ability: Strong Jaw
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
-Fishious Rend
-Psychic Fangs
-Rock Slide
-Crunch
-1 252 Atk Strong Jaw Dracovish Fishious Rend (85 BP) vs. 4 HP / 0 Def Landorus-Therian: 122-146 (73.9 - 88.4%) -- guaranteed 2HKO
Next is Grimmsnarl. Definitely used as a screener.
Heatran @ Shuca Berry
Ability: Flash Fire
EVs: 228 HP / 252 SpAtk / 28 Spe
Modest Nature
-Earth Power
-Flash Cannon
-Heatwave
-Protect
252+ SpA Heatran Flash Cannon vs. 252 HP / 4 SpD Grimmsnarl: 188-224 (93 - 110.8%) -- 62.5% chance to OHKO
Metagross @ Life Orb
Ability: Clear body
EVs: 252 HP / 252 Atk / 4 Def
Adamant Nature
-Iron Head
-Protect
-Stomping Tantrum
252 Atk Life Orb Metagross Iron Head vs. 252 HP / 0 Def Grimmsnarl: 260-307 (128.7 - 151.9%) -- guaranteed OHKO
Next is Amoongus. It is used as a wall, especially a special wall.
Glastrier @ Assault vest
Ability: Chilling Neigh
EVs: 252 HP / 252 Atk / 4 SpD
Brave Nature
-High Horsepower
-Close Combat
-Icicle Crash
-Heavy Slam
252+ Atk Glastrier Icicle Crash vs. 236 HP / 76 Def Amoonguss: 206-246 (94 - 112.3%) -- 62.5% chance to OHKO
Zapdos @ Life Orb
Ability: Static
EVs: 4 HP / 4 Def / 248 SpA / 252 Spe
Timid Nature
- Thunderbolt
- Heat Wave
- Hurricane
- Protect
252 SpA Life Orb Zapdos Hurricane vs. 236 HP / 196+ SpD Amoonguss: 211-250 (96.3 - 114.1%) -- 68.8% chance to OHKO
Heatran @ Shuca Berry
Ability: Flash Fire
EVs: 228 HP / 252 SpAtk / 28 Spe
Modest Nature
-Earth Power
-Flash Cannon
-Heatwave
-Protect
252+ SpA Heatran Heat Wave vs. 236 HP / 196+ SpD Amoonguss: 116-140 (52.9 - 63.9%) -- guaranteed 2HKO
Next, Let's Go to Kartana.
Kartana is a pure offensive sweeper. Some common counters are: Urshifu, Urshifu Rapid and Cinderace.
Here are some sets and calculations.
Cinderace @ Life Orb
Level: 50
Ability: Libero
EVs: 252 Atk/4 SpD252 Spe
Jolly Nature
- Pyro Ball
- Bounce
- High Jump Kick
- Iron Head
252 Atk Life Orb Libero Cinderace High Jump Kick vs. 4 HP / 0 Def Kartana: 213-252 (157.7 - 186.6%) -- guaranteed OHKO. Even a non super effective hit does big damage.
252 Atk Life Orb Cinderace Pyro Ball vs. 4 HP / 0 Def Kartana: 395-468 (292.5 - 346.6%) -- guaranteed OHKO
Look at Pyro ball.
Urshifu @ Focus Sash
Ability: Unseen Fist
EVs: 252 Atk/4 Def/252 Spe
Jolly Nature
-Wicked Blow
-Close Combat
-Sucker Punch
-Protect
252 Atk Choice Band Urshifu Wicked Blow vs. 4 HP / 0 Def Kartana on a critical hit: 123-145 (91.1 - 107.4%) -- 50% chance to OHKO
Not super effective and still a very good move. Close combat is amazing on it.
252 Atk Choice Band Urshifu Close Combat vs. 4 HP / 0 Def Kartana: 246-290 (182.2 - 214.8%) -- guaranteed OHKO
Urshifu-Rapid-Strike @ Choice Band
Ability: Unseen Fist
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Surging Strikes
- Close Combat
- Aqua Jet
- U-turn
252 Atk Choice Band Urshifu-Rapid-Strike Close Combat vs. 4 HP / 0 Def Kartana: 246-290 (182.2 - 214.8%) -- guaranteed OHKO
Niiiiiiiiiiiiiiiiiice.
Next is Whimsicott. It is a support mon with tailwind. Honestly, most Pokemon can OHKO it, but still. Glastrier, Zapdos and Heatran.
Heatran @ Shuca Berry
Ability: Flash Fire
EVs: 228 HP / 252 SpAtk / 28 Spe
Modest Nature
-Earth Power
-Flash Cannon
-Heatwave
-Protect
Zapdos @ Life Orb
Ability: Static
EVs: 4 HP / 4 Def / 248 SpA / 252 Spe
Timid Nature
- Thunderbolt
- Heat Wave
- Hurricane
- Protect
Glastrier @ Assault vest
Ability: Chilling Neigh
EVs: 252 HP / 252 Atk / 4 SpD
Brave Nature
-High Horsepower
-Close Combat
-Icicle Crash
-Heavy Slam