Ok, Ok... but what is going on?
Yes this is great for an online flash movie that nobody will care about 5 years from now, but the story doesn't really make sense.
At the end the celebration that the two brothers are both alive in the same reality is only undertood by us (the audience) who have seen both Mario's and Luigi's "adventures." Mario doesn't get it, the kingdom doesn't get it, Peach doesn't get it either. Luigi knows what he is celebrating, really, he saved Mario, twice! The celebration seems grand enough for the series, however it should only be for (mostly Mario's) the fight against Wart! I really don't think that it is all concluded so easily. I mean at first Luigi thought it was Bowser, and then, it wasn't, now Wart! Are they sure it is over???? Why does the kingdom feel safe? All that happened was that Mario attacked Wart and his kingdom, that solves the problem? The conclusion that Mario and Luigi are both alive together and Peach saved Luigi is great; they are happy and safe, and Luigi's original pain (started in part 1) is finally eased and concluded without sacrificing his own life (causing Mario's pain and fuel for revenge). But will there not be annother attack? If it was Wart, why? (we had an intro in part 1 explaining "Bowser's" surprise attack) Are things cool with Bowser?
I think this is just the beginnig, and the celebration a mere battle victory (accept to Luigi, and Mario a bit). Everyone should be scared, look at the power of revenge, look at how fate can twist reality, is anyone sure exactly what happened, or why Luigi had the dream in the first place? Who was the attack really from? There is room for a sequel here! The series is not concluded!
Unless of course it is a metaphysical theatre, where the reality of the situation is to be an interpretation of an "audience member." That is to say, killing the immediate enemy appealed to the audience and is therefore justified as a "safe" conclusion. That is also to say that the one who really launched the bombs at the start, and gave Luigi his dream was the one who created the story! And that neither Bowser nor Wart is guilty of the attack, but they were forced into oppositionary roles, doomed to be destroyed from the start.
But it was really great, that is why I decided to write a review. Some newgrounds things (or online) have been remembered for more than five years, maybe this can!