COUNTER: DEFENSIVE TOGEKISS
Togekiss @ Leftovers
Ability: Serene Grace
EVs: 252 HP / 252 Def / 4 Spe
Bold Nature
- Roost
- Air Slash
- Defog/Thunder Wave/Heal Bell
- Nasty Plot/Aura Sphere/Flamethrower (or Fire Blast)
Sporting quite respectable 85/95/115 bulk, and a solid defensive typing (immunity to Ground and Dragon is quite good) with good coverage, Defensive Togekiss is a great option to counter all Dragonite sets as well as most Garchomp sets as well (as long as they don't carry Poison Jab or Stone Edge). Being weak to Stealth Rocks isn't fun, especially since this set works decently as a Defogger, and also because you can't repeatedly switch in while rocks are up to counter the things you usually counter.
Still, this set has a lot of options depending on what your teams needs (Stallbreaker=use Nasty Plot, Cleric=use Heal Bell, beat Bisharp/Tyranitar on the switch in=use Aura Sphere, beat Ferrothorn and Scizor [latter on switch in]=use Flamethrower or Fire Blast), and it's bulky enough to get the job done.
Note that since Dragonite is carrying a Lum Berry, you'll need to Thunder Wave it twice to get your Serene Grace hax going. This means Dragonite can often set up to +2 on you, which should be accounted for in calcs, at least to some degree.
Calcs below.
Defensive:
+2 252+ Atk Dragonite Fire Punch vs. 252 HP / 252+ Def Togekiss: 137-162 (36.6 - 43.3%) -- 98.9% chance to 3HKO after Leftovers recovery
+2 252+ Atk Dragonite Extreme Speed vs. 252 HP / 252+ Def Togekiss: 146-172 (39 - 45.9%) -- guaranteed 3HKO after Leftovers recovery
+1 252+ Atk Dragonite Fire Punch vs. 252 HP / 252+ Def Togekiss: 103-122 (27.5 - 32.6%) -- 72.4% chance to 4HKO after Leftovers recovery
+1 252+ Atk Dragonite Extreme Speed vs. 252 HP / 252+ Def Togekiss: 110-130 (29.4 - 34.7%) -- 100% chance to 4HKO after Leftovers recovery
252+ Atk Dragonite Fire Punch vs. 252 HP / 252+ Def Togekiss: 69-82 (18.4 - 21.9%) -- possible 6HKO after Leftovers recovery
252+ Atk Dragonite Extreme Speed vs. 252 HP / 252+ Def Togekiss: 73-87 (19.5 - 23.2%) -- possible 6HKO after Leftovers recovery
Offensive:
0 SpA Togekiss Air Slash vs. 0 HP / 0 SpD Multiscale Dragonite: 47-56 (14.5 - 17.3%) -- possible 6HKO
0 SpA Togekiss Air Slash vs. 0 HP / 0 SpD Dragonite: 94-112 (29.1 - 34.6%) -- 8.7% chance to 3HKO
As you can see, even at +2, Dragonite does below 50%, meaning that you can Roost out Extreme Speed if needed, and can wait till parahax kick in. Once Multiscale is broken, you 4HKO Dragonite cleanly.
If Dragonite is unboosted and tries to exploit the fact that you're switching in to check it a lot by spamming Fire Punch or Extremespeed and then switching out to a counter, note that you don't take much damage at all (sub 25%) and can still beat Dragonite 1v1 later on. In addition, Dragonite probably doesn't want to DD up on you even with a Lum Berry, as you still win almost all scenarios (barring hax) and losing the Lum Berry is bad if your opponent wants to try and sweep later on at all.