These might have been posted already, but it's a huge ass thread, so....
I've noticed a couple of errors, my Victini learned the move Headbutt, and the description says you can use headbutt to find pokémon in trees, a feature from HG/SS, but not in B/W.
In a double battle, my Moguryuu hit everyone with earthquake, including Charen's Yanappu. It said "Yanappu <br> is not very effective...", or something weird looking to that effect.