http://www.gamers.com/news/1292630
Well, it seems like there will be a PokeMon game for the GCN by summer in Japan but from early translations, it doesn't seem like it will be a full fledged RPG like many had hope but closer to something like PokeMon Stadium or something.
The game will require the use of either one of the new PokeMon games either Ruby or Sapphire, but I don't know what the connection is for, I guess we just got to wait for more info.