Thank you for updating.
I'm happy to see some technical stuff here, but it might be a little too technical (if that's even a thing). Thundurus, as expected, will be in a weird situation with Ground-types, being half-Flying type, but completely useless against them, but that's all I can say about it, as I never really use legendaries (yes, I know that not all legendaries are in Übers). Hitmontop with Normal Gem and Fake Out looks like a great combination. Feint is pretty weak even with Technician and even Normal Gem, so I would suggest switching it with a high-power move, as you'll get your money's worth out of Fake Out in most situations. Not too sure about Wide Guard either. Blaziken with Aerial Ace isn't necessary, so I'd switch it out with something like Rock Slide. There's your main attacker right there. Cresselia looks like it's in good shape, but I would suggest Leftovers over a Sitrus Berry, as it's probably going to be there for a while. Rotom (Wash, I presume), will work great as a lead if you choose to use it instead of Thundurus for that position. If it is to do that, I would suggest switching Thunderbolt out with Volt Switch, so you can switch out after using Trick. Hydreigon will be offensively annoying for a lot of stuff, with the exception of Steel and Fairy types, that is, if you are to use Outrage. Bulldoze *could* get rid of Steel types, but it probably isn't the strongest move you could be using, being stuck with Choice Band. It will still do a lot of damage though. Fortunately for you, two-thirds of your team has Levitate. Giga Impact will seem like it can 1HKO anything that isn't Steel or Rock-type, but Outrage will be even more powerful with Hydreigon's STAB anyways, and having to recharge will take away from a turn you could've done more damage with, so I never recommend using recharging moves. However, if you're trying to get rid of a particularly annoying Fairy-type, you might want to use this.
Overally, this is a pretty decent looking team. Good luck in using it.