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Probably best to maybe to live with it until it passes on its own. I keep getting it too, even when I clear the cache, but it seems to be coming and going in periods for me, so it's still a little better off than what it was before.
The thing to keep in mind is that BW2 and Conquest were...
It's partially working for me. Most pages seem to work now, though not always. I still can't get into yellow (color group) for instance no matter how many times I try. =P Most other pages don't seem to be having this problem.
Edit: Nevermind about most of the pages, the issue is still quite common.
Maybe the site just had a server fart? Lol, jokes aside, I too have been wondering what's been up. But even if traffic isn't the cause of this, I do imagine that the traffic still isn't helping the server in the slightest. Maybe the wiki should be temporarily taken offline until this issue is...
That reminds me, Bulbawiki never keeps me logged in for 30 days. Even if I check the option, it will still log me out after several hours or so.
It doesn't bother me too much, but it does get to be a bit of a hassle having to log in again constantly.