o.oAlso, if he has to bench any of his Pokes, please, let it be Gliscor, I agree that it is the weakest on Ash's team, in both character development and battle wise. Sure, All of Ash's Sinnoh pokemon have decent character development this generation, but if I had to choose which one felt weak, it would be his Gliscor.
I'd say Gliscor's journey from an adorable spaz afraid of battle, unable to glide properly, and clingy to Ash to a badass, adorable spaz perfectly capable of battling and gliding is character development as far as Pokémon are concerned. Maybe not in comparison to Monferno's terrific storyline or Grotle (who's actually had a lot going on), but it's definetly something.
In comparison, Staraptor has practically no personality or character development. I'd put Buizel below Monferno, Grotle, and Gliscor, too.