Pretty good
I love Paper Mario and this made me nostalgia all over myself. It had good action scenes and would normally be perfect considering the fluid animation and such.
The only problem is, considering it's for Madness Day it wasn't very... Madness-y.
There just wasn't enough senseless violence and non-stop action that makes a Madness flash a Madness flash. At times it made me forget it was Madness themed.
Other than that though, kudos to you, Good Sir and/or Madame for being an awesome animator and making me DESPERATELY want to play Paper Mario now.