Hmm, maybe you could try this:
Sazandora @ Choice Scarf
Kyurem @ Life Orb (If you can get it, otherwise use Salamence)
Tyranitar/Hippowdon, whichever you can get somehow.
Excadrill @ Life Orb/Leftovers/Balloon
Randorosu @ Leftovers (Sub SD set)
Nattorei @ Leftovers for hazards.
What I came up with is..
Serperior -Grass (I want a challenge.)
Kinklang -Steel (Can learn Electric moves.)
Stoutland- Normal
Jellicent- Water/Ghost
Darmanitan- Fire
i think you need a Flying pokemon. For example: Braviary, Unfezant, Archeops, and.....yeah. those three are decent enough. Swoobat is another case though. Umm, to put it politely, its stats are below the expected amount.
tbh most my in game teams are pokemon that I would never really use competitvely XD
Seeing as how the games aren't very difficult I usually go for the cooler looking pokemon and the fun ones. Just because I love using the underrated pokemon
My team would go something like
Serperior
Cofagrius
Pansage ---> reference to my awesome avatar made by an awesome person ^.^
Conkeldurr
Zebstrika - always get the electric type caught near the start ^.^ Raichu, Manectic, Luxray and now Zebstrika ftw X)
Bisharp - Tauros anyone?
Will be a joy to see this team conquer the elite 4 ^.^
Two Pokemon that would be useful in any team are Conkeldurr (Robushin) and Ferrothorn (Nutrei).
Both pretty awsome Pokemon.
I've seen Conkeldurr tare up teams while Ferrothorn sits there and takes what the opponent has to dish out, plus with its Steel Thorns ability you can stirke back. It'll also learn Stealth Rock if you want it to.