It's originally Japanese-language but there's an English language pack available for it. It's only available via file-sharing websites so I haven't gotten a chance to try it yet, but the graphics look incredible!
I just thought this was an awesome piece of trivia and it got me wondering how many other people on here are gamers, and if you've already tried/would love to try this game!
I also wonder how widely known this game is. Ever since we got Super Smash Brothers with Pikachu I've longed for a game that would allow you to play AS the pokemon in a fighting game (something so much more satisfactory about you being the one pressing "b" for sand attack, that sort of mentality! :3 ) and while this is a far cry from the 3D fully immersive experience that SSB is, this is definitely a step towards what I was thinking about!