Potential is obvious... but be careful
I see some fine potential with this to be a good series, but I still think there are a few things that need to be checked....
1- Credits- I get that crediting where you get sprites from and who is voicing who is important, BUT do you do not need to include it twice!
2- Storyline and plot- The plot is fine (zombies rise up and start killing everyone but a few survivors set off on a suicidal mission and some die on the way to find the solution to the problem and so on...) BUT you moved too fast (literally I thought it was lag at first but you just jump from shot to shot too much) I couldn't even see what happened to toadette and Petey other than he suddenly lies flat on the ground and she jumps on the plane window as a zombie.
3- Animation- The animation of the dialogue is fine and so is the sprite movement, but that being said... just seeing all the characters walking and shooting off screen zombies that are then laid on their path as they walk by is not very good for anything
4- Cast of characters- Mario game characters, what more is there to say other than that.... ohh and Why Ludwig? seriously why did you pick Ludwig as the only surviving Koopaling?
5-Voice Acting- The voice actors did a great job themselves, but you may want to include subtitles, because some things are a tad unclear at first.
That's all for now, but if you fix those few things you have a potentially great series going.