Meh...
I was good, i'll give you credit, however... (and please take this as constructive not being a dick)
1. The first time Mario jumped on the screen he was about a pixel high off the background. (not much but still noticeable)
2. Your sprite work was good... but WHY is Mario and Luigi fighting? Keep in mind how many MvL movies there areo n Newgrounds therefore creatign a need to make yours stand out from the others.
3. You test should be alittle bit bigger and it might not be a bad idea to make some type of transparent background with the alphas for the text so the viewer can read the text easier.
4. I liked the "choose the winner" but the out comes weren't really long enough/interesting enough. Though I did really like what you did with Lugig aiming his fireball.
Other then that, good job, keep up the good work, but try to find a subject that hasn't been over done on Newgrounds. Good luck!