I see a few problems. Mostly with Gothitelle and Slaking, so I'll focus on them.
For Gothitelle, explain to me why you don't like one of the best abilities in competitive Pokemon. Wobbuffet was banned to Ubers last gen because of Shadow Tag. Shadow Tag Chandelure, as far as I'm aware, is banned, although that may be because it hasn't been released yet, not sure. Also, I'd recommend Trick and Focus Blast for the ability to cripple walls and for perfect neutral coverage between Ghost and Fighting. But I don't really see how Base 95 SpA is all that great when you have Latios's Base 130 to use with Specs.
Slaking is a terrible Pokemon in general. There's a reason it's NU and that reason is Truant. It means Slaking is complete set-up fodder every other turn, and many things can switch in after a KO and set a sweep up on that turn alone. Protect users will also screw it, Chandelure being the most notable. There was a combo a while back with Entrainment Truant Durant and Chandelure that led to a guaranteed 6/6 Chandelure which would then proceed to sweep, all because of Truant. Second, never ever ever use Giga Impact or its equivalents ever on any Pokemon for any reason. The one turn of cooldown is all the opponent needs to set up and sweep you, if they've made their team well.
Last edited by loco1234; 7th January 2013 at 12:55 AM.
"Whether Castform the Weather Pokemon can weather the weather is dependent on whether the weather that it's weathering is the proper weather for it to weather. Whether the opponent can weather the weather is also subject to whether the weather that it's weathering is the right weather to weather. Whether Castform can weather the opponent is once again dictated by the weather and whether that weather is the favorable weather for weathering. But most importantly, you should know whether there will be weather to weather rather than what weather they will be weathering and whether they can weather that weather."
- Smogon's Castform analysis