Dragonite is one of my favorite pokemon, so I have many sets for him/her. Here they are (with explanation):
Dragonite (F) @ Leftovers
Trait: Multiscale
EVs: 252 Atk / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Roost
- Brick Break
- Dragon Claw
- Dragon Dance
With This Dragonite, I take advantage of multiscale and use roost when needed. You are more than likely to use it first knowing you will have at least 1 dragon dance used already. A lot of people have steel types to counter dragons because they will not die from a hit and this can be annoying, so to counter you use brick break (whats a reflect to you pfft). This set can be proven useful. He has won me many battles.
Dragonite (M) @ Lum Berry
Trait: Inner Focus
EVs: 252 Atk / 252 Spd
Adamant Nature (+Atk, -SAtk)
- Dragon Dance
- Outrage
- Brick Break
- Earthquake/waterfall
This Dragonite was built to kill quickly as you can see the Adamant Nature. Lum Berry is there to protect him from confusion and or (thunder wave, toxic, spore, etc.) And with dragon dance your outrage is very lethal. Brick Break For steel types and other problems. Earthquake is to ensure that other nuisances are dead and gone. The can be replaced by waterfall as it covers more types than earthquake and can be better.
Dragonite (F) @ Leftovers
Trait: Multiscale
EVs: 252 Atk / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Dragon Dance
- Roost
- Dragon Tail
- Waterfall
This Dragonite was my most recent creation. I did notice off the top that Dragon Tail has a very low priority, so to work around it i had another pokemon to have stealth rock and with 1 dragon dance already being used dragon tail puts in more damage and constantly switches out making your opponent take more damage from S.R. Roost takes advantage of multiscale and leftovers helps support it further, waterfall is to cover other annoying types like steel.