I noticed a few bugs.
First off, I also found that broken Furret link on the tiers page. That still isn't fixed.
Second of all, Roselia isn't listed on the advanced Tiers page, at all. It is a Final Evolution, so it should be on one of the tiers, ya?
Thirdly, Bellossom's page in the advanced pokedex doesn't list moves that can be learned from previous evolutions, of which there are quite a few.
I love the site by the way. It's the best-organized pokedex and move-building guide that I've found so far, so I'd like to see these bugs fixed to make it a little more perfect.