I'm glad it's not just me. I've been avoiding going back to the wiki just because of the ads because Jesus fucking Christ, they bog down everything so badly.
Bulbapedia is worse than Mario Wiki when it comes to ads. Mario Wiki's ads, unless they are very big, don't usually bother me.
Bulbapedia's ads distort their pages, usually are videos from WatchMojo (one of the worst top 10 channels on youtube ever.) and Win.GG, and can't even be turned off. I hate browsing on the site, as the ads worsen the experience dramatically.