Final Level: Corona Mountain
Why It Sucked: Sunshine tried harder than any other Mario game (besides Legend of the Seven Stars) to have a story, and that was its first mistake. For the second, well, all you have to do is hear Bowser and his little brat Bowser Jr. open their maws one time, and you'll understand why Zelda games still don't have voice acting.
How We Would End It: We would have never shoehorned a dumb story into a Mario game to begin with.