Getting better, still needs work.
I very much enjoyed this flash movie, although a few minor things bothered me.
1. Sprite-size relations: The size of Sonic (compared to Tails) really bothered me. Sonic 3 & Knuckles, Tails is scaled propotionally to Sonic. Seeing Sonic's scaled pixels to Tails' smaller ones bothered me.
2. Laugh Track: It is in my opinion that something truly funny does not need a laugh track cued. I'd get rid of those, unless it was a laugh track of one of the characters laughing at the other.
3. Wah-wah-waaaaah: Good for only certain situations. For example, Sonic getting squashed by the boulder when Tails tried to 'save' him is good for that. But Tails getting blasted into oblivion? ...no.
Other than those three things, I'd have to say your flash skills are improving. The animation was nice and smooth, and ...admittedly I'm a sucker for Metal Sonic. ^_^ You get three gold stars for putting him in!