Wait a moment... Does Pokemon Black 2 has "Banpresto" and "Game Freak" copyrights?!
Oh well. I won't be able to find out what this game is until it installs. My only guess is that it's an official port made exclusively for China, considering how big is the cache the game has to load after installing... And yet the cache download never, never EVER goes farther than 17% on mine.
On the different side of the topic, I've got a couple of YONG YONG games for Android before, via RobGBA.