This Dragonite set can take on a variety of roles for a team, including paralysis spreader, sweeper, lure, and a check to some of the top threats of the metagame. Thunder Wave allows Dragonite to support slower teammates as well as itself, which most importantly means that it gets more opportunities to use Roost, possibly reactivating Multiscale in the process, allowing it to survive an otherwise fatal hit. With Thunder Wave slowing opposing Pokemon down, Dragonite can invest all of its EVs in bulk and power, making it so Dragonite can function as an effective tank. In a similar vein with Tinkerbell Celebi, Dragonite should aim to spread paralysis early-game and fire off strong attacks later. While Dragonite's 100 base Special Attack doesn't seem like much, it is more than enough to hit a pretty decent majority of the metagame hard thanks to high-power attacks in Draco Meteor and Fire Blast.
Due to the heavy threat level of the omnipresent Dragon Dance and Choice Band variants of Dragonite, this set can also act as an effective lure, dealing heavy damage to physical walls such as Slowbro, Gliscor, and Skarmory that might switch in expecting to take an Outrage only to meet a Draco Meteor or a Fire Blast, paving the way for physical sweepers, such as Terrakion and Scizor, to sweep. Luring in physical walls is something rain variants of Dragonite cannot do, as special attacks such as Hurricane and Thunder might be expected under these conditions. If Dragonite is using Leftovers and Thunder Wave happens to be revealed before either of Dragonite's attacks are, it can effectively bluff being the Multiscale shuffler set and surprise foes with a powerful attack, as Multiscale shuffler Dragonite typically does not invest in its offenses. Draco Meteor is Dragonite's strongest attack, and thanks to the STAB boost it receives, only a handful of non-Steel-type Pokemon are able to switch in to it and live to tell the tale. Fire Blast provides excellent coverage alongside Draco Meteor, with the combination of the two attacks only resisted by Heatran. Flamethrower is a viable alternative to Fire Blast, but the drop in power is noticeable. However, if sun support is provided, Flamethrower is generally the better option, as with the sun boost, Flamethrower gets all the KOs Fire Blast would, in addition to having perfect accuracy.
Options: Leftovers is an option to increase Dragonite's survivability, but without Life Orb, Dragonite misses out on a significant amount of OHKOs and 2HKOs, becoming a less effective lure as a result. However, if this Dragonite is used on a sandstorm or hail team, Leftovers will be necessary to mitigate the residual damage. The EVs provided give Dragonite an HP number not divisible by four, guaranteeing that it can switch in on Stealth Rock four times as opposed to three without fainting. The remaining EVs are invested in Special Attack, and a Modest nature is used so that Dragonite can hit as hard as possible and also help obtain the above amounts of damage.
If the Special Attack drops from Draco Meteor are an issue, Dragon Pulse can take its place. Dragon Pulse allows Dragonite to stay in longer, thus alleviating its need to switch into Stealth Rock. However, the drop in power is noticeable, and Dragonite loses out on a number of KOs. Dragonite has access to some useful support options, such as Heal Bell and Light Screen, but has trouble fitting them into the set. Additionally, Heal Bell is incompatible with Multiscale, and giving up Multiscale is not recommended under any circumstances. Draco Plate can be used to power up Draco Meteor while maintaining Multiscale, but Dragonite is usually better off boosting both attacks with Life Orb or healing with Leftovers.
Counters: This set has severe difficultly breaking through Heatran and Blissey, both of which can Toxic and stall out Dragonite. Thanks to the boost in Special Defense it receives from sand, Tyranitar can also wall Dragonite, breaking its Multiscale with sandstorm damage, and threatening Dragonite with its powerful Stone Edge. Tyranitar would also gladly absorb a Thunder Wave, as this allows it to switch in on Scalds from bulky Water-types and not have to risk becoming crippled by a burn. Terrakion makes an excellent partner as it and Dragonite share decent type synergy, and Terrakion can scare off or set up on all three of the aforementioned threats. Dragonite can also eliminate some of Terrakion's checks while providing paralysis support for it to abuse with a setup move such as Swords Dance, Rock Polish, or a combination of both. Ninetales is a fine partner to consider because the sun it provides eliminates residual damage caused by opposing hail and sand while boosting the power of Dragonite's Fire-type attack. Dragonite must be cautious of opposing Ground-types as they can switch into Thunder Wave. Two Ground-types in particular that give Dragonite problems are Gastrodon and both formes of Landorus, all of which can retaliate with 4x super effective Ice-type attacks. However, Landorus can't take a hit from Dragonite and Gastrodon will fall to two consecutive Draco Meteors if it takes a little prior damage.
As Dragonite is weak to Stealth Rock, Rapid Spin support is obviously appreciated, especially for Life Orb variants, which can be worn down quite quickly. Based on the damage calculations above, entry hazards of your own can help Dragonite net more KOs. Forretress can provide both entry hazards and its Fire-type weakness grants Dragonite more opportunities to switch in. Jirachi makes an excellent partner to this set, as the two resist all of each others' weaknesses and Jirachi can provide much appreciated Wish support. Cleric support can prove useful for healing Dragonite of status, but is not a necessity as Dragonite is immune to Toxic Spikes. Furthermore, the only Pokemon in OU that can safely status Dragonite without being KOed by Draco Meteor or Fire Blast are Blissey, Heatran, and specially defensive Jellicent.
This is a good moveset for dragonite (Pokemon #149) with the multiscale ability/trait, a Modest nature, and equipped with Life Orb submitted by TeamRocketGrunt. For use in competitive Pokemon battles featuring an Export option and breeding guide.