EPIC! ABSOLUTELY EPIC!
This is freakin' AMAZING! When Mario swallowed the fire flower, I would've sworn he was 3D if I didn't know better.
One tiny, miniscule thing you need to watch for: Spelling/grammar. It's not much, I know, but pay attention to capitalization and such. I notice such things very easily, and I saw a couple mistakes here and there. If the rest of the movie wasn't so incredible, I'd knock this thing down to a 9 overall.
I laughed when they read Mecha Sonic's power as over 9000. A quick question, though: From where did you get Mecha Sonic's voice samples? I mean, what character(s)?