This comment was posted at Thread: What is the worst UI problem you have ever seen?.
I agree that UIs can break a game. Sadly, I tend to replay games instead of buying new ones, so I don't have any examples of bad UIs to offer. Sorry!
(Also, I haven't played any Pokemon game beyond Gen. V, so I can't comment on the UIs of the new games, either.)
(Also, I haven't played any Pokemon game beyond Gen. V, so I can't comment on the UIs of the new games, either.)