This is one of those things that I assume everyone has seen, but is worth posting because (a) it’s ace and (b) I only realised this evening that I’d never seen the conclusion. It’s a flash animation of Super Mario Brothers, redone as an epic, with appropriate soundtrack, battles, the works. There are some longueurs in the middle, and it has to be said that some of the dialogue could have done with proofreading, but all in all it is, as I said, ace. At least, it is if you have any joy in your soul and/or nostalgia for Super Mario Bros. Without further ado:
- Part one (2003)
- Part two (2003)
- Part three (2003)
- Part four (2004)
- Part five (2006)
I am particularly impressed to find that, despite the two-year gap between parts four and five, the ending was clearly planned from the start.
vector-bsfa.com 
Your link for Part four goes to Part five.
Thanks for sharing this!
Because it’s so good you need to watch it twice! (Fixed now, though, thanks.)