Just friggin' wow...
Wow Alvin, I have to say, I really am impressed!
This is Kazuo-san, from Deviantart. I'm not really well-known, but hey, I went through and faved all of your random shorts today! But that's beside the point. I first saw Super Mario Bros. Z on YouTube. I kinda got into it because of the name, "Super Mario Bros. Z." I figured itd be worth the attention... And boy was I right! I grew up playing Mario games, and even some Sonic, so I can so appreciate the references and characterization you put in! Some of the characters are so spot-on, it just makes the viewing experience that much better. (I like to use Toadsworth as an example.)
I love the idea, and the squence the story is going into. I'm actually really excited for the next episode! I've watched the 4 versus 4 fight scene in this fourth episode like twenty times. I loved it. And I do hope you find new and unique ways to spice up the fight scenes!
Over all, I have to say that your use of flash and sprites is amazing. It's nice and crisp, and clean. The musical accompaniment, and the sounds, are right-on, too! I'd have to say that you're a sprite-flash genius. I can understand why it took as long as it did!
Now, as a personal note from me... I'm SO glad that Luigi did some fighting. Luigi is my favorite character in the Super Mario series, so I'm really glad he got his light. (I can see lots of other people are happy, too.) And his fighting style was just SO like him... And I loved when he used the "Green Missile" attack from SSBM. I just had to say to myself, "A+ Alvin... Fuckin' A+."
Now all the series is missing is a perverted character. No show is complete without one!