Lessee:
Chesnaught- Holy crap yours has the same nature mine does. Although I really want to change it when I get far enough on that file, so not for long.
That aside, Cut has gotta go. If you want coverage, as has been said, Body Slam is good. You can also use Bulk Up if you like buffing moves, but I'd rather do away with Leech Seed for that than sacrifice the coverage.
Granbull- Smeargle can net you some nice options with this. I have one with Play Rough, Bulk Up, Thunder Wave and Close Combat for a general idea of a few. Rock Smash should be done away with, though. If you want a Fighting move, either breed for Close Combat from Zangoose, or pick up Brick Break, since it's there. That's also been said. I'd also rather one of the fangs than Strength (Ice Fang? You're lacking an Ice move, after all.) but that's just me.
Swanna- ...is not a Pokemon I'd use, so I can't offer much advice for you. Brave Bird is a bit weird on it, but, it does have Roost. I'd rather run an entirely special set, since all of its Water moves are special, but then we have Hurricane that's broken at the moment, leaving you with Air Slash as your best Flying move, so...
Oh, and if you'd like, you can chain Scald onto it with Simipour -> Psyduck. Probably your best available Water move and it has that nice burn chance.
Emolga- Encore is a bit weird, but, I guess it could mess with someone. Since you're using Nuzzle, switch Volt Switch for Electro Ball. They're a deadly combo that's not to be trifled with.
Heatmor- I've never used one of these... um. Looking at its stats I see a slow mixed-attacker. Breeding for Sucker Punch can help with its Speed problems, Hone Claws is a nice buffing option, and... hmm, this one is tricky...
There are better Fire-types out there, though. Houndoom is a very nice choice for a replacement, but you can also pick up Typhlosion or Chandelure. Although the former of those is kinda limited in coverage options.
Why am I the only one who has ever had trouble with Radomus since his team change
Arbok- As someone who still uses Skuntank of all things (I spent five hours searching for it leave me alone) it's not my place to say this, but... I'd trade it for something else. If it's another Poison-type you want (and you decide against Houndoom), Drapion is pretty cool- much faster and very sturdy on the physical side to make up for the loss of Intimidate. There's also Scolipede who has Speed Boost and Baton Pass and I don't think I need to tell you how broken that combo is.
If you want to keep it, I'd breed for Poison Jab over Acid Spray and pick up one of the fangs instead of Sludge Wave. Those combo better with Screech. Glare is good, though. Paralysis is always nice.
Your team is pretty unique, though. And you get points from me because Chesnaught is my favourite Kalos starter and doesn't get much love.