At a glance:
I've re-built my team from Gen IV and switched around a bunch of guys and I finally came up with this. I tested it on Pokemon Online for a few weeks and finally built it on PokeSav for my DS. I've had two battles with it and am 2-0. Please don't hold back, rate away and point out absolutely anything.





Changes will be made in Bold

Uxie @ Choice Scarf
Impish
Levitate
252 HP / 104 Def / 152 Spe
-Trick
-Thunder Wave
-Stealth Rocks
-U-Turn
Trick-Scarf uxie has always been my lead in Gen IV, but it got shut down if the enemy switched in a choicer of their own. He shuts down a lot of leads and most likely will receive a sash, lefties, or lum berry. Lefties and lum are always useful to have as an item while sash you can trick it onto another pokemon that is already damaged. Now in Gen V, if Uxie tricks itself another choice item, he can actually switch moves. This means he can either set up rocks, T-wave the choicer that came in, or just U-turn out. Later in the game he serves as great fodder with taking a hit and U-turning out or just taking a hit and dieing to get good switch advantage.

Heatran @ Leftovers
Calm
Flash Fire
252 HP / 252 SpDef / 4 SpAtk
-Lava Plume
-Earth Power
-Hidden Power (Ice)
-Roar
Specially defensive Heatran is another returning pokemon from my Gen IV team. He has great synergy with the Trick-Scarf Uxie. He is normally the pokemon I go to after Uxie U-turns out. He forces lots of switches, especially in this metagame. On the opponent's switch I normally roar to get some scouting as well as rocks damage going on. Lava Plume is an awesome stab move with a great 30% chance to burn. Earthpower hits opposing fire types as well as some rock types. Hidden Power Ice is now great for coverage in this metgame. He hits a lot of x4 Ice-Weak dragons that are locked into Outrage, as well as Gliscor and Landorus (on the switch in). Ive also noticed he is a fantastic Chandelure counter, gaining a Flash Fire boost, or taking a resisted Shadow Ball. Because most Chandelure are scarfed they are forced to switch, presenting another opportunity to hit something with a STAB boosted Lava Plume, or scout with a Roar.

Gengar @ Life Orb
Timid
Levitate
252 SpAtk / 252 Spe / 4 HP
-Shadow Ball
-Focus Blast
-Thunderbolt
-Hidden Power (Ice)
Gengar is another Levitator that not only covers Heatran's x4 Ground-Weakness, but also its x2 Fighting-Weakness. While in-turn, Heatran covers all of Gengar's weaknesses (Dark, Ghost, and Psychic). And now that most people run Hi-Jump Kick whenever they can, he's great for making pokemon like Blazekin and Medicham kill themselves. Unfortunately he can't hit opposing Timid Max Speed Gengar's that don't have any Hidden Power. Focus Blast for obvious coverage (Tyranitar, Heatran, various Ice Types). Not only does Gengar OHKO all the x4 Ice-Weak (bar Yache Berry) with Hidden Power Ice, but he outspeeds them too. After hitting a Yache Chomp as it Swords Dances, you can still outspeed and kill it. Finally Thunderbolt hits bulky waters that aren't part ground type, which are seemingly less common in this metagame. He's my fastest pokemon on my team with all four moves as attacks and he utilizes them all very efficiently.

Gastrodon @ Leftovers
Bold
Storm Drain
212 HP / 252 Def / 44 SpAtk
Scald
Ice Beam
Hidden Power (Grass)
Recover
Gastrodon is another great pokemon paired up with Heatran. He covers his weaknesses fantastically thanks to Storm Drain. With the Storm Drain boost, Gastrodon hits the special attack of a lot of special sweepers. He can also take a lot of hits and has a reliable recovery move. His only weakness is grass which is 4x resisted by Heatran. But even so, there is a scarcity of Water/Ground types running around, so less people have been running grass moves which is very convenient for Gastrodon. Scald is another move with a 30% chance to burn, but it's water type which goes great in combination with Heatran's Lava Plume. Ice Beam again hits all those x4 Ice-Weakness threats while Hidden Power Grass hits other bulky waters besides Tentacruel.

Salamence @ Lum Berry
Naive
Intimidate
252 SpAtk / 252 Spe / 4 Atk
-Draco Meteor
-Outrage
-Earthquake
-Fire Blast
Salamence is another pokemon with only attacks. This is the standard Mixmence except instead of Life Orb or Leftovers, I carry Lum Berry. I was using Life Orb for a while, but with its Stealth Rock weakness, and the abundance of Sandstream, he seems to die too quickly. Lum Berry can also let me feign a Choice item, either Band or Specs. Not only that, it lets me kill bulky status inducers after they attempt to status me. And if he doesn't even get statused in the battle, Lum Berry can clear Outrage confusion. With Dragon / Ground / Fire moves, Salamence hits everything for neutral damage, and big threats like Heatran and Ferrothorn for their x4 Ground/Fire-Weakness (respectively). I use intimidate over his newfound ability Moxie in order to break sweeps and force a switch. He's great because he has a 4x Grass-Resistance to coincide with Gastrodon while Gastrodon has a x2 Rock-Resistance, and a x2 Water/Fighting-Resistance, and a Ground immunity to coincide with Heatran. Heatran also resists Salamence's x4 Ice-Weakness.

Lucario @ Life Orb
Jolly
Inner Focus
252 Atk / 252 Spe / 4 HP
-Swords Dance
-Extreme Speed
-Close Combat
-Crunch
Gen IV Lucario returns, exactly the same as he was before. Basically he just does what he did before: Set up a Swords Dance and proceed to kill things until they die. He outspeeds Reuniclus, Jellicent, and Non-Scarf Chandelure and OHKO's with Crunch. Close Combat at +2 dominates nearly everything. Extreme Speed is absolutely necessary because it now gets +2 priority and kills a lot of things that are faster than Lucario barring that they've taken dents from all of Lucario's other teamates. Not that it matters but his weaknesses are covered by absolutely all of his teamates. He resists both of Salamence's and Gengar's weaknesses too.
So this is my team. Heatran, Gastrodon, and Uxie serve as the supporters who can take hits and hopefully burn things. Gengar and Salamence are used mainly to just dent things with their hard hitting moves. When the time is right, Lucario can come in and set up and just sweep the rest of the opponent's team. Even if I set up too early with Lucario, Salamence, Gengar, and Gastrodon (after a Storm Drain boost) have enough raw power to finish the job. Let me know what you guys think! Thanks!