Best thus far
This is the best Mario Bros. Z episode I have seen so far. Luigi's face was so funny and that was great adding the scouter and the Vegeta and Nappa doing the "IT'S OVER 9000!" "WHAT, 9000?!" bit. That was so damn funny. But since it's Mario Bros. "Z", I was wondering if maybe, by chance, you could add Goku and Vegeta into your next episode. And that bit you did with Mecha Sonic saying "A MONSTER? NO. I AM A GOD!" by taking it from Budokai 3's Broly was also a good move. But it would be nice to see some DBZ characters in this, preferably Goku and Vegeta since they have the same personality as you made Sonic and Shadow have. Anyway, that's just a suggestion and really great episode. Can't wait for episode 7.