My recomended games:

Trauma Center: New Blood: A great game with a good and interesting story, two-player rules, but gets very hard by yourself later in the game even on easy but if you have a friend to play with this game is a blast.

Super Mario Galaxy: A True Mario masterpiece. Don't ever deny getting this game. It is so amazing.

Super Smash Bros. Brawl: The adventure mode in Brawl is very good although I haven't finished it yet, along with the awsome multiplayer experience and is great with friends. The stages are the best yet and the charicter roster is big enough for everyone to find someone to play as.

Super Paper Mario: A great Platformer/RPG game but I liked Paper Mario: The Thousand Year Door better, although Super Paper Mario is still a good game.

Metroid Prime 3: Corruption: A great game and has some of the best use of the Wiimote/Nunchuck that we've seen so far.