There are plenty of games, like fighting games, that are double-blind decision oriented, but have otherwise perfect information in that you know what all of your opponent's possible "moves" are in any given instance. Except not even BW has that, since you don't know what your opponent's moves are. On top of that, the amount of diversity in BW is incredibly high; much higher than something like a street fighter, where there are maybe 15-20 viable characters at best.
I'd say more, but don't have time at the moment. The point is, you're jumping the gun and are for some reason assuming that Pokemon is special, and somehow much more hidden-information-oriented than other games, despite the fact that we haven't really tested a version of the game with less hidden information in the past.