It's a start.
It's not bad, but I think you could do a lot better with this.
For starters, lose the "Wii" part of it. It's completely unrelated to the movie, and it's silly. It's a movie about Mario and the holidays, not about the Wii.
Also, the sprites didn't quite look right. Mario and Luigi both looked a little thin. The movements weren't quite right on, either. Compare what you did to a Mario game, and notice the difference.
The words popping up out of the box were a nice idea, but the font seemed a little plain. You could spruce it up a little and add some holiday-ish stuff to go with it, or at least make the words the appropriate colours for the holiday (red and green for Christmas, blue and white for Hanukkah, etc.)
It's a good first effort, though, and I hope you'll work some more on this.
Oh, yes, and re-release it around the holidays. :)