Potential
The animation has some good potential, but..
Story:
as 'NG-Judge" stated, the back story was a bit bland, it also seemed to move very quickly. once you found out that they were in a tree house they leave it.
Audio:
The voice acting seemed to scripted, especially toadsworth towards the end, and bill_board.I'd also suggest Subtitles (Toggled maybe), doing fake italian accents can really diminish the quality of.. words? (sorry cant thing of a good way to say that)
Action:
There wasn't much to it.. mostly just sprites falling over after a bang, although bowser' fire-breath was a great addition (at that point i was expecting a napalm or something)
Visuals:
the biggest problem i had in this kinda scheme was the very ending with the mob of zombies, they appeared to be in a flat wall, no dimensions added to it, making it not look as good, or as large of an army.
I'm looking forward to a good continuation on this and that you can make it a good series. I hate to compare, but this reminds m of Alvin's Super Mario bros Z Ep.1. looking back on epi1 now it looks kinda bad compared to ep. 8. I'm hoping your skills in animating scripting and voice directing become better as his did throughout the making of this series
//Sorry for making such a long comment n.n;
Good luck ^- ^