Introduction: For about a year now, I've been utilizing my self-created sets. So far, I haven't encountered a single team that is capable of countering this Dragonite set.
Dragonite (M) @ Choice Specs
Name: Choice Specs
Trait: Inner Focus
EVs: 4 Atk / 252 Spd / 252 SAtk
Rash Nature (+SAtk, -SDef)
-Draco Meteor
-Thunder
-Focus Punch/Superpower
- Hidden Power [Grass]
Why this set deserves to be on this site
-Breaks stall teams
-Has very few counters
Damage Calculations
According to the Smogon Damage Calculator, this Dragonite
-Deals 83.5% - 98.7% to Wish-Support Vaporeon set(one of the most sp. def oriented bulky water types in OU) with Thunder
-OHKOs(107.7% - 127.7%) Standard Lead-Swampert with Hidden Power Grass
-Deals 70.6% - 83.2% to Cleric Blissey with Focus Punch(OHKOS in some cases if Blissey's evs are spread for Sp. Atk)
-Deals 66.8% - 78.7% to Curselax with Focus Punch
-Deals 56.3% - 66.4% to Cresselia with Draco Meteor
-OHKOS Skarmory with Thunder(no Damage Calculator necessary)
-Deals 76.6% - 90.1% to Physically Defensive Forretress with Thunder
-Deals 54% - 63.6% to Metagross with Thunder
-Deals 63% - 74.3% to Choice Banded Scizor with Thunder
Additional Comments: If you read smogon's Dragonite analysis and scroll down to the section that lists the counters to Dragonite, the list includes: Cresselia, Scizor and Swampert. All of the pokemon mentioned on the list take more than 50% from Dragonite. Focus Punch/Close Combat are essential as it renders special walls useless against it. Close combat is an obviously more viable option because it has a less-crippling drawback, but if you're confident in your prediction skills, then focus punch is playable for you.
Also: This set is only recommended towards experienced players who can utilize it to its full potential with good prediction skills.
Teammates: Wish support, cleric/heal bell partners and rapid spinners maximize this set's effectiveness.
Counters: I have yet to discover a commonly used pokemon that would counter this set. Maybe pokemon with bizarre ev-spreads, but that would make them less useful towards other purposes.
Other Options: Aqua Tail or Fireblast. Dragonite's huge movepool of special moves is always great to explore and experiment.
As always, I thank you for your time and I hope you look at this set with complete objectiveness and clarity.
~Precognition

Dragonite (M) @ Choice Specs
Name: Choice Specs
Trait: Inner Focus
EVs: 4 Atk / 252 Spd / 252 SAtk
Rash Nature (+SAtk, -SDef)
-Draco Meteor
-Thunder
-Focus Punch/Superpower
- Hidden Power [Grass]
Why this set deserves to be on this site
-Breaks stall teams
-Has very few counters
Damage Calculations
According to the Smogon Damage Calculator, this Dragonite
-Deals 83.5% - 98.7% to Wish-Support Vaporeon set(one of the most sp. def oriented bulky water types in OU) with Thunder
-OHKOs(107.7% - 127.7%) Standard Lead-Swampert with Hidden Power Grass
-Deals 70.6% - 83.2% to Cleric Blissey with Focus Punch(OHKOS in some cases if Blissey's evs are spread for Sp. Atk)
-Deals 66.8% - 78.7% to Curselax with Focus Punch
-Deals 56.3% - 66.4% to Cresselia with Draco Meteor
-OHKOS Skarmory with Thunder(no Damage Calculator necessary)
-Deals 76.6% - 90.1% to Physically Defensive Forretress with Thunder
-Deals 54% - 63.6% to Metagross with Thunder
-Deals 63% - 74.3% to Choice Banded Scizor with Thunder
Additional Comments: If you read smogon's Dragonite analysis and scroll down to the section that lists the counters to Dragonite, the list includes: Cresselia, Scizor and Swampert. All of the pokemon mentioned on the list take more than 50% from Dragonite. Focus Punch/Close Combat are essential as it renders special walls useless against it. Close combat is an obviously more viable option because it has a less-crippling drawback, but if you're confident in your prediction skills, then focus punch is playable for you.
Also: This set is only recommended towards experienced players who can utilize it to its full potential with good prediction skills.
Teammates: Wish support, cleric/heal bell partners and rapid spinners maximize this set's effectiveness.
Counters: I have yet to discover a commonly used pokemon that would counter this set. Maybe pokemon with bizarre ev-spreads, but that would make them less useful towards other purposes.
Other Options: Aqua Tail or Fireblast. Dragonite's huge movepool of special moves is always great to explore and experiment.
As always, I thank you for your time and I hope you look at this set with complete objectiveness and clarity.
~Precognition