Mamoswine wrecks havoc. Nothing can deal with it.
Mono-Dragon is more complicated than you can think.
You'll need something that might stand the road, and also you'll need a lot of work here and there.
- First off, Latios and Garchomp are banned together.
- No neutrality to Ice
- Too much offensiveness. Water mono-teams wreck you, especially where Azumarill is.
- Mega Latios would anyway be banned.
- I hope Alpha Kyogre or Mega-Kyogre or whatever the hell will they name it, will be Dragon. And Groudon too.
First: Latios or Garchomp?
The answer is plain: None, or Garchomp if truly necessary.
Kyurem or Kyurem-B are vital members you should try to splash in.
Good sets for either:
@ Leftovers:
Trait: Pressure
EVs: 52 HP / 216 SAtk / 236 Speed
Modest Nature
- Substitute
- Roost
- Ice Beam / Earth Power
- Dragon Pulse
Dual STAB or better coverage is up to you for the choice between Ice Beam and Earth Power.
@ Life Orb:
Trait: Teravolt
EVs: 252 SAtk / 252 Speed / 4 Atk
Hasty Nature
- Ice Beam
- Draco Meteor / Earth Power
- Dragon Claw / Outrage
- Hidden Power {FIRE} / Earth Power
If you really hate Kyurem, Kingdra is neutral to Ice as well and abuse Rain coming frequently from Mono-Water teams. Thus you can keep Garchomp or Latios.
@ Haban Berry:
Trait: Swift Swim
EVs: 252 SAtk / 252 Speed / 4 Atk
Hasty Nature
- Dragon Dance
- Waterfall
- Draco Meteor
- Hidden Power {FIGHTING} / {FIRE}
Dragon Dance isn't useless, it boosts Speed as much as Attack.
Then, something defensive.
Druddigon or Shelgon are your only viable fits in this category and they are vital. I prefer Druddigon because Sucker Punch destroys Lati-Twins from Mono-Psychic or opposing Mono-Dragons.
@ Eviolite:
Trait: Overcoat
EVs: 252 HP / 252 Def / 4 Atk
Impish Nature
- Dragon Tail
- Wish
- Toxic
- Protect
It shuffles around your opponent's team. Stealth Rock Garchomp helps a lot.
Or, Latios and Druddigon pair up well together.
@ Leftovers:
Trait: Rough Skin
EVs: 252 HP / 252 Atk / 4 Speed
Adamant Nature
- Dragon Tail
- Stealth Rock
- Sucker Punch
- Glare
4 Speed speed creeps other Druddigons, and you paralysis them before they do. Sucker Punch is amazing against Mono-Psychic and Ghosts to an extend, and Dragon Tail shuffles the foe's team. Stealth Rock is vital facing Mono-Ice. Kingdra is awesome against Mamoswine.
Let's see how can we splash the changes to your team:
First: The one I'd pick
Or, the one I'd not pick
There is a lot of possibilities.
In the first team:
(bolded choice go together)
Latios: Choice Scarf Trick
Druddigon: Support
Kingdra: Specially based Mixed sweeper
Goodra: Assault Vest tank (Sludge Bomb> Thunderbolt)
Dragalge: Choice Specs abuse / Stall
Noivern: Choice Specs / Life Orb
In the second team:
Kyurem: SubRoost
Shelgon: Support
Tyrantrum: Your set
Flygon: Your set
Goodra: Assault Vest tank (Sludge Bomb > Thunderbolt)
Noivern: Choice Scarf
Hell, that's long. Sorry.
I hope this helped!
~ Sincerely yours, Blitz.