The Legend of Zelda:  Twilight Princess.

To be honest, I can't comment too much on this game.  Why?  Because I haven't played it.  Why?  Because my brother has pretty much hogged it!  However, I don't mind, because at least I get to see the story.

Pros:  The story to this game is absolutely phenominal.  It's almost cinematic at times.

Cons:  The one con I can say now is that the speaker for the Remote for this game is terrible.  I highly suggest muting it so you can hear the sound effects the way they were meant to be heard.

Rayman Raving Rabbids

Pros:  The Rabbids are just about the funniest characters ever seen.

Some minigames are so funny, I had problems playing them because I was laughing so hard.  ("Bunnies are oversensative" and "Bunnies are slow to react" are quite possibly the funniest premises for a game ever)

Cons:  For some minigames, the controls are very unresponsive.

Some minigames are just too frustrating (I actually needed my brother to help me in two games.  I don't see how one person could have possibly done it)