Cheren and his gym were previously mentioned in other non-filler episodes. Plus you can't skip this because Ash and his friends decide to travel there in a previous episode. And the inclusion of a character from the games should be more than enough to say this is a non-filler.
Originally Posted by matt0044
Last edited by diakyu; 6th May 2013 at 1:56 AM.
To right the countless wrongs of our day, we shine this light of true redemption, that this place may become as paradise. What a wonderful world such would be...