oh man are there some good games out there...
well seeing on how like one person mentioned a game for the wii i'll start mentioning games for the wii, and some for the gamecube...there were little great games but it had it's hidden jems....
Wii: Zac and Wiki, No More Heroes, Metroid Prime 3, Super Mario Galaxy, Zelda....there are a good few that will last you a while
Gamecube: Tales of Symphonia, Metroid Prime 1 and 2, Eternal Darkness, Geist, Freedom Fighters.
have fun