There are so many new pokemon games being announced and/or being released in Japan. There are currently four that i am aware of.
Gold/Silver remakes- DS
Pokemon Mystery Dungeon: Explorers of the Sky- DS
Pokemon Mystery Dungeon: Blazing, Stormy, & Light Adventure Teams- WiiWare
Melee! Pokemon Scramble!- WiiWare
I am so totaly going to get theses when they come out they all look amazing.
for more informmation on these games take a peek at this site:
http://serebii.net/index2.shtmlthe video games section is along the left side