Don't run Smellingsalt on Aggron. The paralysis is more useful than the one-time extra power. Use Rock Slide for STAB instead.
Gorebyss is dead weight against any team with Haze, Taunt, or a shuffling move such as Roar, and most good teams have one of those moves. Either give it Surf or replace it.
You have way too much offensive pressure on Sceptile. He can outspeed and KO some common Waters, but if they survive, they can easily OHKO with Ice Beam. In particular, Suicune can easily take a Leaf Blade and KO back if Sceptile has taken the slightest amount of damage. After that, it's game over for the rest of your team except maybe Hariyama.
For that matter, Grass-types, especially ones with Brick Break or Earthquake, utterly decimate you. They can all KO T-Tar, Aggron, Gorebyss, and Regirock while crippling Hariyama with sleep and Sceptile with Paralysis. Same goes for fighting-types (especially the mighty Medicham), but they can just power their way through with Super-effective moves instead of using status.
Also, basically all of your pokemon only use Rock/Ground/Fighting moves, which is very redundant coverage. If Sceptile goes down or even just get paralyzed, a ton of pokemon have a field day with your team, and Skarmory can almost completely shut you down with some Wish support.
I'm no RSE expert, but any team with as much redundant type coverage as yours will face serious problems against a well prepared team. A ton of pokemon, mainly Fighting (No solid counters), Water(One counter), and Grass(One kinda-sorta counter) ones, completely destroy you. I would take Sceptile and T-Tar, who form a solid offensive core, and completely rebuild your team from scratch. Sorry.