i didn't read all of the replies, but pokemon is so much more than deck building. if it were only deckbuilding, i'd be a world champ. you should play the best deck that's available to you at the time. why go to a tournament if you don't want to win? that doesn't mean go online and netdeck, it means playtest to actually find out what the best deck is. if you test your 'rogue' deck to the point that you have a good amount of favorable matchups, then you should play it at the tournament. if its a 'rogue' deck with your favorite pokemon or whatever but loses to the majority of the field, why ever play it at a tournament you're guaranteed to lose?