This seems very troublesome. Its a good thing I almost never use Bulbapedia. Guess I'm gonna have to make it absolutely never until a solution is found. I think the most reasonable solution would be trying to replace the ads. Of course I'm not much of a genius on the internet so....
Stay. Away. From. My. Cookie.
We think the problematic ads have now been eliminated by our networks. Please let us know ASAP if they reoccur. It should however be safe to resume regular browsing of Bulbapedia.
神出鬼没 - shin shutsu ki botsu
Since the issue is resolved, anyone with a TVTropes account, can you edit the warning out of their page because they're still warning people away from the site.
My friends have accounts, they took it down.