I know this isn't really related to the last few posts, but I just wanted to say that more people should give Froslass and Gothitelle a try.
For Froslass, I've actually been finding her to be almost on par with Deoxys-D in terms of Spiking (in my opinion at least, though Deoxys-D is certainly very good and it can use Stealth Rock too while being much bulkier). I hadn't used her very much in this generation because the generation started off with Deoxys-S unbanned (who totally outclassed her at the time), but I'm going to use her a lot more now.
The reason I'm finding it so good is that the 110 base Speed gives her a really fast Taunt as well as fast Spikes. Even Deoxys-D needs Magic Coat to stop it, though Froslass might be carrying a STAB Shadow Ball, which will hurt like hell, even off of 80 base Special Attack. I personally run a spread that has max Speed and Timid but has the rest dumped into Defense and HP to survive a Tyranitar Crunch.
Froslass can also play a lot of mind games with the opponent because of Destiny Bond. Because Froslass is so fast, she can Destiny Bond on slower attacks and take the opponent with it. This means you have to risk attacking her and getting killed, or risk not attacking her and letting her set up another layer of Spikes. Another thing with Destiny Bond is that if something like Scizor comes in and uses Bullet Punch while your Sash is up, you can predict that and use Destiny Bond before it does so. Because Destiny Bond lasts until you execute your next turn (ie. if you use Destiny Bond, then it lasts until you use another move or switch), Scizor will get killed if it tries to Bullet Punch you again the next turn, meaning that you can set up a layer of Spikes in the meantime. Of course, Froslass can also Taunt her opponent to force it into attacking mode for Destiny Bond.
Because of Froslass's Ghost-typing, she can also block spins by herself so she can't be rudely interrupted while she's setting up hazards (though it might be a good idea to carry a dedicated spinblocker too). She actually does pretty decently against the spinners too, especially Donphan and Starmie, who are both weak to her STABs. Tentacruel and Forretress can't do much against her either because she can just Taunt their hazards and they risk getting Destiny Bonded too.
Also, just for the record, Cursed Body has messed up many opponents who try attacking Froslass, getting me some nice extra layers of Spikes.
Just pair her up with a Stealth Rock user and she'll do a really good job.
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As for Gothitelle, all I really have to say is that Tricking a Choice item with Shadow Tag is absolutely evil. I think it's actually more potent than Encore + Shadow Tag from Wobbuffet simply because it literally screws up the pokemon of your choice for the remainder of the match, instead of just the Encore. Plus, it makes for very easy setup. Just Trick a Specs or Scarf onto the opponent's wall and that pokemon basically become setup bait for the rest of the match.
I'm actually really surprised at how little I see Gothitelle, because he's really good and ridiculously easy to use.