http://www.smogon.com/dp/pokemon/lucario On Lucario's Agility set it says: Sword Dance Lucario's popularity and beat all of his common checks and counters such as Gengar, Rotom-A, Gliscor, Dragonite. It also says: If you were using Swords Dance Lucario, even if you have the perfect opportunity to set up, counters such as Dragonite and Gliscor can switch in on the Swords Dance and OHKO Lucario before he has a chance to attack. Any mention of Dragonite being a counter is false. With no investment in Defenses and a neutral nature 80.2% - 94.7% from a +2 Close combat and 71.8% - 84.5% from Extreme speed. Even with a bulkier set Nite is taking 67.1% - 79.3% from a +2 Close Combat, all of these calcs guranteed or at least a high probability to OHKO with rocks and if Luke chose to run Stone Edge and a Jolly nature no variant of Dragonite will win. Therefore any mention of Dragonite countering SD Luke here should be removed.