Once again, a great job.
Can never wait for the next episode, I even promote these on my website.
My only criticism is the sort of over-dark fate of the Sonicverse, but this isn't over yet, so that's sort of pending(they could just be really hurt, Sonic could pull a deus ex machina at the end with the Chaos Emeralds, too soon to tell).
I'm sort of hoping that maybe the Crystal Stars from Paper Mario: The Thousand Year Door come into play... Crystal Stars vs. Chaos Emeralds...
Finally, I love the chemistry going on between the characters. If there was ever an official Sonic/Mario team-up, I'd hope it'd play out something like this, at the very least where the character interaction is concerned.
LBD "Nytetrayn"