Probably the best Mario game on the Wii
The storyline is about Bowser kidnapping Peach. Mario must do many missions to obtain stars to power up the ship he will use to save Peach. However, the levels in the missions are all different. They range from Ice Worlds to Lava Worlds to the Tropics to the Deserts and many many other levels.
Further more, the graphics are just awesome. I haven't seen any Nintendo game match the graphics Mario Galaxy produced. Apart from that, the physics of being in space are quite realistic. Making the graphics even better is the vivid and bright colours. The full potential of your TV can be put to use.
The bosses at each level are just... hilarious. They are all different. Ranging from a giant mole to a giant walking man-eating plant to a rock-throwing tree and many other bosses (don't forget Bowser). Adding to this fun, are power-ups. You can use power-ups to shoot fireballs, walk on water, turn into a ghost and other unusual abilities. The controls are easy and fun to use. To shake the remote and the character twirls around or even shoot fireballs. In one level, you twirl in a dust cyclone. It's simply fun.
This is a Wii classic that needs to be bought. One of the best Wii games ever.