Xenoblade: commonly referred to as the greatest jrpg of last gen
Mario Galaxy: Took 3D Mario to a new level. Also the series most fans want the Wii U to continue
Wii Sports: The game that made motion controls a must have.
Skyward Sword: Although people are divided on whether they like this game, it did bring motion controls to a more core franchise and proved that they could work.
Metroid Prime 3: One of my personal favorites from last gen.