Well I didn't say they were necessarily bad episodes, just filler. The Cottonee and Elgyem episodes were rather ehhhh, though.
Also, Roggenrola's done okay so far, hasn't it? It hasn't been used in any important battles that I've seen, but it's still done its job.
--
http://i38.tinypic.com/2zqtqur.jpg
http://img255.imageshack.us/img255/1011/picture3e.jpg