Wow is the first thing i have to say. Secondly I'd like to introduce myself. I'm Kaoskaix, but Kai or Kaix works well for a shorter name and I have followed this games evolution from time to time since I first saw sky blue at the sphere website. I have always been in awe of the balls you have to push the capabilities of a pokemon game and your desire to please the crowd while still following what you wanted.
I'd also like to briefly point out that the reason i never posted anything sooner was simply because I never had anything to contribute other than "WHOA"
Well to the main point, this game is awesome. It is utterly incredible. I'd have to say it is the best sounding game out there. There just simply aren't comparisons. Furthermore don't listen to anyone who tells you it is bad for whatever reason. The only beef I have with it is the rules of the pokemon card game. Personally never liked the style of the gameplay. I saw less strategy in it compared to Yu gi oh (or at least more subtle strategy in pokemon which is also a turn off) I wish you nothing but the best of luck and I will still follow the game and look for advice to give just not as much.
All that being said I think the first piece of advice would be that you may want to find a way to prevent the "ultimate deck"/"ultimate decks" Many card games make it too easy to sit down and figure out the perfect deck and then simply gather the cards necesary which is alsways a big turn off to the casual newcomer.
My suggestion would be to just keep up the great work until people refine the "ultimate decks" then research them, find the cards that make the deck together and add them to a list that bans random cards from the list every day. This way you get people constantly refining their decks in a seemingly indefinite manner and you also give them a reason to find cards to help them prepare for things that are unforseen. The list itself could be automated from a central server and the code could be written so that the cards are all grouped into the decks they are used in and that the program must add atleast one card from every deck every three days or so. The program must account for cards that are in multiple decks. This will ensure that the most used cards ideally, are banned more often and the least used cards are less often banned.