Powerhouse Dragon #1
Haxorus (M) @ Choice Band
Trait: Mold Breaker
EVs: 4 HP / 252 Atk / 252 Spd
Adamant Nature (+Atk, -SAtk)
- Outrage
- Dual Chop
- Brick Break
- Earthquake
I really wish this could be Garchomp. Garchomp would give this team a much needed Rock resist and fairly reliable Tyranitar switch-in. Oh well, Haxorus still brings the same offensive capabilities to the table. Hopefully when Shark Skin Garchomp is released, it'll be unbanned. The moveset is pretty self-explanatory, just knock down Walls with a +1 Outrage.
Ninetales
Ninetales (F) @ Leftovers
Trait: Drought
EVs: 252 HP / 80 SDef / 176 Spd
Timid Nature (+Spd, -Atk)
- Safeguard
- Protect
- Will-O-Wisp
- Flamethrower/Overheat
As I mentioned in the Minor Changes section, I made a few changes to your original moveset. First, Protect was added over Hidden Power. Yeah Protect wastes a turn of Safeguard, but it allows Ninetales to scout Specs Politoed so your Dragons wont end up switching into a +1 Ice Beam. Also, a bunch of EVs were added to Speed so Ninetales can revenge kill Lucario and Mamoswine, two potential sweepers to this team.
Naturally Fast Dragon
Latios (M) @ Life Orb
Trait: Levitate
EVs: 12 HP / 252 SAtk / 244 Spd
Timid Nature (+Spd, -Atk)
- Dragon Pulse
- Recover
- Psyshock
- Hidden Power [Fire]
This could be any OU Dragon with a Choice Scarf. Latias and Latios, however, don't require a Scarf because they are the fastest Dragons in OU - they can easily revenge kill opposing Banded Dragons. Latios provides the team with a solid Fighting resistance, especially against Terrakion and Infernape. Choice Scarf Mence could also work here.
Chlorophyll Abuser
Tangrowth (M) @ Leftovers
Trait: Chlorophyll
EVs: 252 Atk / 4 SAtk / 252 Spd
Naughty Nature (+Atk, -SDef)
- Growth/Sleep Powder
- Power Whip
- Earthquake
- Hidden Power [Ice]
Tangrowth is the only Pokemon I added to your V3 line up. I love your Shiftry set, but Tangrowth's added bulk helps the team with Mamoswine, Tyranitar, and Sand teams. The main role for the Chlorophyll abuser is to revenge kill +1 Speed Dragons.
Powerhouse Dragon #2
Hydreigon (M) @ Life Orb / Expert Belt
Trait: Levitate
EVs: 4 HP / 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)
- Draco Meteor
- Dark Pulse
- Fire Blast
- Focus Blast/Earth Power
Like Choice Band Haxorus, there's not much to say here. Just break down Walls with a powerful Dragon attack. A -2 Fire Blast still manages to OHKO most Steels in the Sun. Its also worth noting that a Choice Spec set with U-Turn over Dark Pulse could work here as well, but that might make Calm Mind Reuniclus a potential problem.
Heatran
Heatran (M) @ Leftovers
Trait: Flash Fire
EVs: 244 HP / 252 SDef / 12 Spd
Calm Nature (+SDef, -Atk)
- Substitute
- Roar
- Lava Plume
- Stealth Rock
Heatran's mainly here to deal with set up sweepers (most notably Cloyster and Volcarona) and to sponge opposing Dragon attacks. An Air Balloon set could work too, but those sets are really only effective when there's another Steel on the roster.